1618 lines
139 KiB
JavaScript
1618 lines
139 KiB
JavaScript
(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);throw new Error("Cannot find module '"+o+"'")}var f=n[o]={exports:{}};t[o][0].call(f.exports,function(e){var n=t[o][1][e];return s(n?n:e)},f,f.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
|
||
var Connector;
|
||
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||
Connector = (function() {
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function Connector() {
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this.is_synced = false;
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this.compute_when_synced = [];
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||
this.connections = {};
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||
this.unsynced_connections = {};
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||
this.receive_handlers = [];
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||
this.sync_process_order = [];
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||
}
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||
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||
Connector.prototype.whenSynced = function(args) {
|
||
if (this.is_synced) {
|
||
return args[0].apply(this, args.slice(1));
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} else {
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||
return this.compute_when_synced.push(args);
|
||
}
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||
};
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||
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Connector.prototype.whenReceiving = function(f) {
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return this.receive_handlers.push(f);
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};
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Connector.prototype.multicast = function(peers, message) {
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return this.whenSynced([_send, peers, message]);
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};
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Connector.prototype.unicast = function(peer, message) {
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return this.whenSynced([_send, peer, message]);
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};
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Connector.prototype.broadcast = function(message) {
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return this.whenSynced([
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||
(function(_this) {
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||
return function() {
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var peer, peerid, _ref, _results;
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||
_ref = _this.connections;
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_results = [];
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||
for (peerid in _ref) {
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peer = _ref[peerid];
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_results.push(_this._send(peerid, message));
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}
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return _results;
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};
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})(this)
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||
]);
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};
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||
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Connector.prototype.whenSyncing = function() {
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var i, _i, _ref, _results;
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_results = [];
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for (i = _i = _ref = arguments.length - 1; _ref <= 0 ? _i <= 0 : _i >= 0; i = _ref <= 0 ? ++_i : --_i) {
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_results.push(this.sync_process_order.unshift(arguments[i]));
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}
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return _results;
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||
};
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||
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return Connector;
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||
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||
})();
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||
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module.exports = Connector;
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||
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||
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||
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},{}],2:[function(require,module,exports){
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var Connector, TestConnector, _,
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__hasProp = {}.hasOwnProperty,
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__extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };
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_ = require("underscore");
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Connector = require('../connector');
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TestConnector = (function(_super) {
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__extends(TestConnector, _super);
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function TestConnector(id) {
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this.id = id;
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TestConnector.__super__.constructor.call(this);
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this.execution_order = [];
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this.receive_buffer = {};
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this.connections = {};
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this.whenReceiving((function(_this) {
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||
return function(user, message) {
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return _this.execution_order.push(message);
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};
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})(this));
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}
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TestConnector.prototype.join = function(conn) {
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var c, cid, comp, _i, _len, _ref, _ref1, _results;
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this._addConnection(conn.id, conn);
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_ref = conn.connections;
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||
for (cid in _ref) {
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c = _ref[cid];
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this._addConnection(cid, c);
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}
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||
this.is_synced = true;
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||
_ref1 = this.compute_when_synced;
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||
_results = [];
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||
for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
|
||
comp = _ref1[_i];
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||
_results.push(comp[0].apply(this, comp.slice(1)));
|
||
}
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||
return _results;
|
||
};
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||
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TestConnector.prototype._addConnection = function(id, user_connector) {
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||
var data, data_, i, user_data, _i, _ref;
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||
if (this.connections[id] == null) {
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||
data = null;
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||
user_data = null;
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||
for (i = _i = 0, _ref = this.sync_process_order.length; 0 <= _ref ? _i < _ref : _i > _ref; i = 0 <= _ref ? ++_i : --_i) {
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||
data_ = this.sync_process_order[i].call(this, user_data);
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||
user_data = user_connector.sync_process_order[0].call(user_connector, data);
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||
data = data_;
|
||
}
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||
this.connections[id] = user_connector;
|
||
return user_connector.connections[this.id] = this;
|
||
}
|
||
};
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||
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||
TestConnector.prototype.getOpsInExecutionOrder = function() {
|
||
return this.execution_order;
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||
};
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||
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||
TestConnector.prototype._send = function(uid, message) {
|
||
var rb, _name;
|
||
rb = this.connections[uid].receive_buffer;
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||
if (rb[_name = this.id] == null) {
|
||
rb[_name] = [];
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||
}
|
||
return rb[this.id].push(message);
|
||
};
|
||
|
||
TestConnector.prototype.flushOne = function(uid) {
|
||
var f, message, _i, _len, _ref, _ref1, _results;
|
||
if (((_ref = this.receive_buffer[uid]) != null ? _ref.length : void 0) > 0) {
|
||
message = this.receive_buffer[uid].shift();
|
||
_ref1 = this.receive_handlers;
|
||
_results = [];
|
||
for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
|
||
f = _ref1[_i];
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||
_results.push(f(uid, message));
|
||
}
|
||
return _results;
|
||
}
|
||
};
|
||
|
||
TestConnector.prototype.flushOneRandom = function() {
|
||
var c, cid, connlist;
|
||
connlist = (function() {
|
||
var _ref, _results;
|
||
_ref = this.receive_buffer;
|
||
_results = [];
|
||
for (cid in _ref) {
|
||
c = _ref[cid];
|
||
_results.push(cid);
|
||
}
|
||
return _results;
|
||
}).call(this);
|
||
return this.flushOne(connlist[_.random(0, connlist.length - 1)]);
|
||
};
|
||
|
||
TestConnector.prototype.flushAll = function() {
|
||
var f, message, messages, n, _i, _j, _len, _len1, _ref, _ref1;
|
||
_ref = this.receive_buffer;
|
||
for (n in _ref) {
|
||
messages = _ref[n];
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||
for (_i = 0, _len = messages.length; _i < _len; _i++) {
|
||
message = messages[_i];
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||
_ref1 = this.receive_handlers;
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||
for (_j = 0, _len1 = _ref1.length; _j < _len1; _j++) {
|
||
f = _ref1[_j];
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||
f(n, message);
|
||
}
|
||
}
|
||
}
|
||
return this.receive_buffer = {};
|
||
};
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||
|
||
return TestConnector;
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||
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||
})(Connector);
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||
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||
if (typeof window !== "undefined" && window !== null) {
|
||
window.TestConnector = TestConnector;
|
||
}
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||
|
||
if (typeof module !== "undefined" && module !== null) {
|
||
module.exports = TestConnector;
|
||
}
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||
|
||
|
||
|
||
},{"../connector":1,"underscore":3}],3:[function(require,module,exports){
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||
// Underscore.js 1.7.0
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||
// http://underscorejs.org
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||
// (c) 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
|
||
// Underscore may be freely distributed under the MIT license.
|
||
|
||
(function() {
|
||
|
||
// Baseline setup
|
||
// --------------
|
||
|
||
// Establish the root object, `window` in the browser, or `exports` on the server.
|
||
var root = this;
|
||
|
||
// Save the previous value of the `_` variable.
|
||
var previousUnderscore = root._;
|
||
|
||
// Save bytes in the minified (but not gzipped) version:
|
||
var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype;
|
||
|
||
// Create quick reference variables for speed access to core prototypes.
|
||
var
|
||
push = ArrayProto.push,
|
||
slice = ArrayProto.slice,
|
||
concat = ArrayProto.concat,
|
||
toString = ObjProto.toString,
|
||
hasOwnProperty = ObjProto.hasOwnProperty;
|
||
|
||
// All **ECMAScript 5** native function implementations that we hope to use
|
||
// are declared here.
|
||
var
|
||
nativeIsArray = Array.isArray,
|
||
nativeKeys = Object.keys,
|
||
nativeBind = FuncProto.bind;
|
||
|
||
// Create a safe reference to the Underscore object for use below.
|
||
var _ = function(obj) {
|
||
if (obj instanceof _) return obj;
|
||
if (!(this instanceof _)) return new _(obj);
|
||
this._wrapped = obj;
|
||
};
|
||
|
||
// Export the Underscore object for **Node.js**, with
|
||
// backwards-compatibility for the old `require()` API. If we're in
|
||
// the browser, add `_` as a global object.
|
||
if (typeof exports !== 'undefined') {
|
||
if (typeof module !== 'undefined' && module.exports) {
|
||
exports = module.exports = _;
|
||
}
|
||
exports._ = _;
|
||
} else {
|
||
root._ = _;
|
||
}
|
||
|
||
// Current version.
|
||
_.VERSION = '1.7.0';
|
||
|
||
// Internal function that returns an efficient (for current engines) version
|
||
// of the passed-in callback, to be repeatedly applied in other Underscore
|
||
// functions.
|
||
var createCallback = function(func, context, argCount) {
|
||
if (context === void 0) return func;
|
||
switch (argCount == null ? 3 : argCount) {
|
||
case 1: return function(value) {
|
||
return func.call(context, value);
|
||
};
|
||
case 2: return function(value, other) {
|
||
return func.call(context, value, other);
|
||
};
|
||
case 3: return function(value, index, collection) {
|
||
return func.call(context, value, index, collection);
|
||
};
|
||
case 4: return function(accumulator, value, index, collection) {
|
||
return func.call(context, accumulator, value, index, collection);
|
||
};
|
||
}
|
||
return function() {
|
||
return func.apply(context, arguments);
|
||
};
|
||
};
|
||
|
||
// A mostly-internal function to generate callbacks that can be applied
|
||
// to each element in a collection, returning the desired result — either
|
||
// identity, an arbitrary callback, a property matcher, or a property accessor.
|
||
_.iteratee = function(value, context, argCount) {
|
||
if (value == null) return _.identity;
|
||
if (_.isFunction(value)) return createCallback(value, context, argCount);
|
||
if (_.isObject(value)) return _.matches(value);
|
||
return _.property(value);
|
||
};
|
||
|
||
// Collection Functions
|
||
// --------------------
|
||
|
||
// The cornerstone, an `each` implementation, aka `forEach`.
|
||
// Handles raw objects in addition to array-likes. Treats all
|
||
// sparse array-likes as if they were dense.
|
||
_.each = _.forEach = function(obj, iteratee, context) {
|
||
if (obj == null) return obj;
|
||
iteratee = createCallback(iteratee, context);
|
||
var i, length = obj.length;
|
||
if (length === +length) {
|
||
for (i = 0; i < length; i++) {
|
||
iteratee(obj[i], i, obj);
|
||
}
|
||
} else {
|
||
var keys = _.keys(obj);
|
||
for (i = 0, length = keys.length; i < length; i++) {
|
||
iteratee(obj[keys[i]], keys[i], obj);
|
||
}
|
||
}
|
||
return obj;
|
||
};
|
||
|
||
// Return the results of applying the iteratee to each element.
|
||
_.map = _.collect = function(obj, iteratee, context) {
|
||
if (obj == null) return [];
|
||
iteratee = _.iteratee(iteratee, context);
|
||
var keys = obj.length !== +obj.length && _.keys(obj),
|
||
length = (keys || obj).length,
|
||
results = Array(length),
|
||
currentKey;
|
||
for (var index = 0; index < length; index++) {
|
||
currentKey = keys ? keys[index] : index;
|
||
results[index] = iteratee(obj[currentKey], currentKey, obj);
|
||
}
|
||
return results;
|
||
};
|
||
|
||
var reduceError = 'Reduce of empty array with no initial value';
|
||
|
||
// **Reduce** builds up a single result from a list of values, aka `inject`,
|
||
// or `foldl`.
|
||
_.reduce = _.foldl = _.inject = function(obj, iteratee, memo, context) {
|
||
if (obj == null) obj = [];
|
||
iteratee = createCallback(iteratee, context, 4);
|
||
var keys = obj.length !== +obj.length && _.keys(obj),
|
||
length = (keys || obj).length,
|
||
index = 0, currentKey;
|
||
if (arguments.length < 3) {
|
||
if (!length) throw new TypeError(reduceError);
|
||
memo = obj[keys ? keys[index++] : index++];
|
||
}
|
||
for (; index < length; index++) {
|
||
currentKey = keys ? keys[index] : index;
|
||
memo = iteratee(memo, obj[currentKey], currentKey, obj);
|
||
}
|
||
return memo;
|
||
};
|
||
|
||
// The right-associative version of reduce, also known as `foldr`.
|
||
_.reduceRight = _.foldr = function(obj, iteratee, memo, context) {
|
||
if (obj == null) obj = [];
|
||
iteratee = createCallback(iteratee, context, 4);
|
||
var keys = obj.length !== + obj.length && _.keys(obj),
|
||
index = (keys || obj).length,
|
||
currentKey;
|
||
if (arguments.length < 3) {
|
||
if (!index) throw new TypeError(reduceError);
|
||
memo = obj[keys ? keys[--index] : --index];
|
||
}
|
||
while (index--) {
|
||
currentKey = keys ? keys[index] : index;
|
||
memo = iteratee(memo, obj[currentKey], currentKey, obj);
|
||
}
|
||
return memo;
|
||
};
|
||
|
||
// Return the first value which passes a truth test. Aliased as `detect`.
|
||
_.find = _.detect = function(obj, predicate, context) {
|
||
var result;
|
||
predicate = _.iteratee(predicate, context);
|
||
_.some(obj, function(value, index, list) {
|
||
if (predicate(value, index, list)) {
|
||
result = value;
|
||
return true;
|
||
}
|
||
});
|
||
return result;
|
||
};
|
||
|
||
// Return all the elements that pass a truth test.
|
||
// Aliased as `select`.
|
||
_.filter = _.select = function(obj, predicate, context) {
|
||
var results = [];
|
||
if (obj == null) return results;
|
||
predicate = _.iteratee(predicate, context);
|
||
_.each(obj, function(value, index, list) {
|
||
if (predicate(value, index, list)) results.push(value);
|
||
});
|
||
return results;
|
||
};
|
||
|
||
// Return all the elements for which a truth test fails.
|
||
_.reject = function(obj, predicate, context) {
|
||
return _.filter(obj, _.negate(_.iteratee(predicate)), context);
|
||
};
|
||
|
||
// Determine whether all of the elements match a truth test.
|
||
// Aliased as `all`.
|
||
_.every = _.all = function(obj, predicate, context) {
|
||
if (obj == null) return true;
|
||
predicate = _.iteratee(predicate, context);
|
||
var keys = obj.length !== +obj.length && _.keys(obj),
|
||
length = (keys || obj).length,
|
||
index, currentKey;
|
||
for (index = 0; index < length; index++) {
|
||
currentKey = keys ? keys[index] : index;
|
||
if (!predicate(obj[currentKey], currentKey, obj)) return false;
|
||
}
|
||
return true;
|
||
};
|
||
|
||
// Determine if at least one element in the object matches a truth test.
|
||
// Aliased as `any`.
|
||
_.some = _.any = function(obj, predicate, context) {
|
||
if (obj == null) return false;
|
||
predicate = _.iteratee(predicate, context);
|
||
var keys = obj.length !== +obj.length && _.keys(obj),
|
||
length = (keys || obj).length,
|
||
index, currentKey;
|
||
for (index = 0; index < length; index++) {
|
||
currentKey = keys ? keys[index] : index;
|
||
if (predicate(obj[currentKey], currentKey, obj)) return true;
|
||
}
|
||
return false;
|
||
};
|
||
|
||
// Determine if the array or object contains a given value (using `===`).
|
||
// Aliased as `include`.
|
||
_.contains = _.include = function(obj, target) {
|
||
if (obj == null) return false;
|
||
if (obj.length !== +obj.length) obj = _.values(obj);
|
||
return _.indexOf(obj, target) >= 0;
|
||
};
|
||
|
||
// Invoke a method (with arguments) on every item in a collection.
|
||
_.invoke = function(obj, method) {
|
||
var args = slice.call(arguments, 2);
|
||
var isFunc = _.isFunction(method);
|
||
return _.map(obj, function(value) {
|
||
return (isFunc ? method : value[method]).apply(value, args);
|
||
});
|
||
};
|
||
|
||
// Convenience version of a common use case of `map`: fetching a property.
|
||
_.pluck = function(obj, key) {
|
||
return _.map(obj, _.property(key));
|
||
};
|
||
|
||
// Convenience version of a common use case of `filter`: selecting only objects
|
||
// containing specific `key:value` pairs.
|
||
_.where = function(obj, attrs) {
|
||
return _.filter(obj, _.matches(attrs));
|
||
};
|
||
|
||
// Convenience version of a common use case of `find`: getting the first object
|
||
// containing specific `key:value` pairs.
|
||
_.findWhere = function(obj, attrs) {
|
||
return _.find(obj, _.matches(attrs));
|
||
};
|
||
|
||
// Return the maximum element (or element-based computation).
|
||
_.max = function(obj, iteratee, context) {
|
||
var result = -Infinity, lastComputed = -Infinity,
|
||
value, computed;
|
||
if (iteratee == null && obj != null) {
|
||
obj = obj.length === +obj.length ? obj : _.values(obj);
|
||
for (var i = 0, length = obj.length; i < length; i++) {
|
||
value = obj[i];
|
||
if (value > result) {
|
||
result = value;
|
||
}
|
||
}
|
||
} else {
|
||
iteratee = _.iteratee(iteratee, context);
|
||
_.each(obj, function(value, index, list) {
|
||
computed = iteratee(value, index, list);
|
||
if (computed > lastComputed || computed === -Infinity && result === -Infinity) {
|
||
result = value;
|
||
lastComputed = computed;
|
||
}
|
||
});
|
||
}
|
||
return result;
|
||
};
|
||
|
||
// Return the minimum element (or element-based computation).
|
||
_.min = function(obj, iteratee, context) {
|
||
var result = Infinity, lastComputed = Infinity,
|
||
value, computed;
|
||
if (iteratee == null && obj != null) {
|
||
obj = obj.length === +obj.length ? obj : _.values(obj);
|
||
for (var i = 0, length = obj.length; i < length; i++) {
|
||
value = obj[i];
|
||
if (value < result) {
|
||
result = value;
|
||
}
|
||
}
|
||
} else {
|
||
iteratee = _.iteratee(iteratee, context);
|
||
_.each(obj, function(value, index, list) {
|
||
computed = iteratee(value, index, list);
|
||
if (computed < lastComputed || computed === Infinity && result === Infinity) {
|
||
result = value;
|
||
lastComputed = computed;
|
||
}
|
||
});
|
||
}
|
||
return result;
|
||
};
|
||
|
||
// Shuffle a collection, using the modern version of the
|
||
// [Fisher-Yates shuffle](http://en.wikipedia.org/wiki/Fisher–Yates_shuffle).
|
||
_.shuffle = function(obj) {
|
||
var set = obj && obj.length === +obj.length ? obj : _.values(obj);
|
||
var length = set.length;
|
||
var shuffled = Array(length);
|
||
for (var index = 0, rand; index < length; index++) {
|
||
rand = _.random(0, index);
|
||
if (rand !== index) shuffled[index] = shuffled[rand];
|
||
shuffled[rand] = set[index];
|
||
}
|
||
return shuffled;
|
||
};
|
||
|
||
// Sample **n** random values from a collection.
|
||
// If **n** is not specified, returns a single random element.
|
||
// The internal `guard` argument allows it to work with `map`.
|
||
_.sample = function(obj, n, guard) {
|
||
if (n == null || guard) {
|
||
if (obj.length !== +obj.length) obj = _.values(obj);
|
||
return obj[_.random(obj.length - 1)];
|
||
}
|
||
return _.shuffle(obj).slice(0, Math.max(0, n));
|
||
};
|
||
|
||
// Sort the object's values by a criterion produced by an iteratee.
|
||
_.sortBy = function(obj, iteratee, context) {
|
||
iteratee = _.iteratee(iteratee, context);
|
||
return _.pluck(_.map(obj, function(value, index, list) {
|
||
return {
|
||
value: value,
|
||
index: index,
|
||
criteria: iteratee(value, index, list)
|
||
};
|
||
}).sort(function(left, right) {
|
||
var a = left.criteria;
|
||
var b = right.criteria;
|
||
if (a !== b) {
|
||
if (a > b || a === void 0) return 1;
|
||
if (a < b || b === void 0) return -1;
|
||
}
|
||
return left.index - right.index;
|
||
}), 'value');
|
||
};
|
||
|
||
// An internal function used for aggregate "group by" operations.
|
||
var group = function(behavior) {
|
||
return function(obj, iteratee, context) {
|
||
var result = {};
|
||
iteratee = _.iteratee(iteratee, context);
|
||
_.each(obj, function(value, index) {
|
||
var key = iteratee(value, index, obj);
|
||
behavior(result, value, key);
|
||
});
|
||
return result;
|
||
};
|
||
};
|
||
|
||
// Groups the object's values by a criterion. Pass either a string attribute
|
||
// to group by, or a function that returns the criterion.
|
||
_.groupBy = group(function(result, value, key) {
|
||
if (_.has(result, key)) result[key].push(value); else result[key] = [value];
|
||
});
|
||
|
||
// Indexes the object's values by a criterion, similar to `groupBy`, but for
|
||
// when you know that your index values will be unique.
|
||
_.indexBy = group(function(result, value, key) {
|
||
result[key] = value;
|
||
});
|
||
|
||
// Counts instances of an object that group by a certain criterion. Pass
|
||
// either a string attribute to count by, or a function that returns the
|
||
// criterion.
|
||
_.countBy = group(function(result, value, key) {
|
||
if (_.has(result, key)) result[key]++; else result[key] = 1;
|
||
});
|
||
|
||
// Use a comparator function to figure out the smallest index at which
|
||
// an object should be inserted so as to maintain order. Uses binary search.
|
||
_.sortedIndex = function(array, obj, iteratee, context) {
|
||
iteratee = _.iteratee(iteratee, context, 1);
|
||
var value = iteratee(obj);
|
||
var low = 0, high = array.length;
|
||
while (low < high) {
|
||
var mid = low + high >>> 1;
|
||
if (iteratee(array[mid]) < value) low = mid + 1; else high = mid;
|
||
}
|
||
return low;
|
||
};
|
||
|
||
// Safely create a real, live array from anything iterable.
|
||
_.toArray = function(obj) {
|
||
if (!obj) return [];
|
||
if (_.isArray(obj)) return slice.call(obj);
|
||
if (obj.length === +obj.length) return _.map(obj, _.identity);
|
||
return _.values(obj);
|
||
};
|
||
|
||
// Return the number of elements in an object.
|
||
_.size = function(obj) {
|
||
if (obj == null) return 0;
|
||
return obj.length === +obj.length ? obj.length : _.keys(obj).length;
|
||
};
|
||
|
||
// Split a collection into two arrays: one whose elements all satisfy the given
|
||
// predicate, and one whose elements all do not satisfy the predicate.
|
||
_.partition = function(obj, predicate, context) {
|
||
predicate = _.iteratee(predicate, context);
|
||
var pass = [], fail = [];
|
||
_.each(obj, function(value, key, obj) {
|
||
(predicate(value, key, obj) ? pass : fail).push(value);
|
||
});
|
||
return [pass, fail];
|
||
};
|
||
|
||
// Array Functions
|
||
// ---------------
|
||
|
||
// Get the first element of an array. Passing **n** will return the first N
|
||
// values in the array. Aliased as `head` and `take`. The **guard** check
|
||
// allows it to work with `_.map`.
|
||
_.first = _.head = _.take = function(array, n, guard) {
|
||
if (array == null) return void 0;
|
||
if (n == null || guard) return array[0];
|
||
if (n < 0) return [];
|
||
return slice.call(array, 0, n);
|
||
};
|
||
|
||
// Returns everything but the last entry of the array. Especially useful on
|
||
// the arguments object. Passing **n** will return all the values in
|
||
// the array, excluding the last N. The **guard** check allows it to work with
|
||
// `_.map`.
|
||
_.initial = function(array, n, guard) {
|
||
return slice.call(array, 0, Math.max(0, array.length - (n == null || guard ? 1 : n)));
|
||
};
|
||
|
||
// Get the last element of an array. Passing **n** will return the last N
|
||
// values in the array. The **guard** check allows it to work with `_.map`.
|
||
_.last = function(array, n, guard) {
|
||
if (array == null) return void 0;
|
||
if (n == null || guard) return array[array.length - 1];
|
||
return slice.call(array, Math.max(array.length - n, 0));
|
||
};
|
||
|
||
// Returns everything but the first entry of the array. Aliased as `tail` and `drop`.
|
||
// Especially useful on the arguments object. Passing an **n** will return
|
||
// the rest N values in the array. The **guard**
|
||
// check allows it to work with `_.map`.
|
||
_.rest = _.tail = _.drop = function(array, n, guard) {
|
||
return slice.call(array, n == null || guard ? 1 : n);
|
||
};
|
||
|
||
// Trim out all falsy values from an array.
|
||
_.compact = function(array) {
|
||
return _.filter(array, _.identity);
|
||
};
|
||
|
||
// Internal implementation of a recursive `flatten` function.
|
||
var flatten = function(input, shallow, strict, output) {
|
||
if (shallow && _.every(input, _.isArray)) {
|
||
return concat.apply(output, input);
|
||
}
|
||
for (var i = 0, length = input.length; i < length; i++) {
|
||
var value = input[i];
|
||
if (!_.isArray(value) && !_.isArguments(value)) {
|
||
if (!strict) output.push(value);
|
||
} else if (shallow) {
|
||
push.apply(output, value);
|
||
} else {
|
||
flatten(value, shallow, strict, output);
|
||
}
|
||
}
|
||
return output;
|
||
};
|
||
|
||
// Flatten out an array, either recursively (by default), or just one level.
|
||
_.flatten = function(array, shallow) {
|
||
return flatten(array, shallow, false, []);
|
||
};
|
||
|
||
// Return a version of the array that does not contain the specified value(s).
|
||
_.without = function(array) {
|
||
return _.difference(array, slice.call(arguments, 1));
|
||
};
|
||
|
||
// Produce a duplicate-free version of the array. If the array has already
|
||
// been sorted, you have the option of using a faster algorithm.
|
||
// Aliased as `unique`.
|
||
_.uniq = _.unique = function(array, isSorted, iteratee, context) {
|
||
if (array == null) return [];
|
||
if (!_.isBoolean(isSorted)) {
|
||
context = iteratee;
|
||
iteratee = isSorted;
|
||
isSorted = false;
|
||
}
|
||
if (iteratee != null) iteratee = _.iteratee(iteratee, context);
|
||
var result = [];
|
||
var seen = [];
|
||
for (var i = 0, length = array.length; i < length; i++) {
|
||
var value = array[i];
|
||
if (isSorted) {
|
||
if (!i || seen !== value) result.push(value);
|
||
seen = value;
|
||
} else if (iteratee) {
|
||
var computed = iteratee(value, i, array);
|
||
if (_.indexOf(seen, computed) < 0) {
|
||
seen.push(computed);
|
||
result.push(value);
|
||
}
|
||
} else if (_.indexOf(result, value) < 0) {
|
||
result.push(value);
|
||
}
|
||
}
|
||
return result;
|
||
};
|
||
|
||
// Produce an array that contains the union: each distinct element from all of
|
||
// the passed-in arrays.
|
||
_.union = function() {
|
||
return _.uniq(flatten(arguments, true, true, []));
|
||
};
|
||
|
||
// Produce an array that contains every item shared between all the
|
||
// passed-in arrays.
|
||
_.intersection = function(array) {
|
||
if (array == null) return [];
|
||
var result = [];
|
||
var argsLength = arguments.length;
|
||
for (var i = 0, length = array.length; i < length; i++) {
|
||
var item = array[i];
|
||
if (_.contains(result, item)) continue;
|
||
for (var j = 1; j < argsLength; j++) {
|
||
if (!_.contains(arguments[j], item)) break;
|
||
}
|
||
if (j === argsLength) result.push(item);
|
||
}
|
||
return result;
|
||
};
|
||
|
||
// Take the difference between one array and a number of other arrays.
|
||
// Only the elements present in just the first array will remain.
|
||
_.difference = function(array) {
|
||
var rest = flatten(slice.call(arguments, 1), true, true, []);
|
||
return _.filter(array, function(value){
|
||
return !_.contains(rest, value);
|
||
});
|
||
};
|
||
|
||
// Zip together multiple lists into a single array -- elements that share
|
||
// an index go together.
|
||
_.zip = function(array) {
|
||
if (array == null) return [];
|
||
var length = _.max(arguments, 'length').length;
|
||
var results = Array(length);
|
||
for (var i = 0; i < length; i++) {
|
||
results[i] = _.pluck(arguments, i);
|
||
}
|
||
return results;
|
||
};
|
||
|
||
// Converts lists into objects. Pass either a single array of `[key, value]`
|
||
// pairs, or two parallel arrays of the same length -- one of keys, and one of
|
||
// the corresponding values.
|
||
_.object = function(list, values) {
|
||
if (list == null) return {};
|
||
var result = {};
|
||
for (var i = 0, length = list.length; i < length; i++) {
|
||
if (values) {
|
||
result[list[i]] = values[i];
|
||
} else {
|
||
result[list[i][0]] = list[i][1];
|
||
}
|
||
}
|
||
return result;
|
||
};
|
||
|
||
// Return the position of the first occurrence of an item in an array,
|
||
// or -1 if the item is not included in the array.
|
||
// If the array is large and already in sort order, pass `true`
|
||
// for **isSorted** to use binary search.
|
||
_.indexOf = function(array, item, isSorted) {
|
||
if (array == null) return -1;
|
||
var i = 0, length = array.length;
|
||
if (isSorted) {
|
||
if (typeof isSorted == 'number') {
|
||
i = isSorted < 0 ? Math.max(0, length + isSorted) : isSorted;
|
||
} else {
|
||
i = _.sortedIndex(array, item);
|
||
return array[i] === item ? i : -1;
|
||
}
|
||
}
|
||
for (; i < length; i++) if (array[i] === item) return i;
|
||
return -1;
|
||
};
|
||
|
||
_.lastIndexOf = function(array, item, from) {
|
||
if (array == null) return -1;
|
||
var idx = array.length;
|
||
if (typeof from == 'number') {
|
||
idx = from < 0 ? idx + from + 1 : Math.min(idx, from + 1);
|
||
}
|
||
while (--idx >= 0) if (array[idx] === item) return idx;
|
||
return -1;
|
||
};
|
||
|
||
// Generate an integer Array containing an arithmetic progression. A port of
|
||
// the native Python `range()` function. See
|
||
// [the Python documentation](http://docs.python.org/library/functions.html#range).
|
||
_.range = function(start, stop, step) {
|
||
if (arguments.length <= 1) {
|
||
stop = start || 0;
|
||
start = 0;
|
||
}
|
||
step = step || 1;
|
||
|
||
var length = Math.max(Math.ceil((stop - start) / step), 0);
|
||
var range = Array(length);
|
||
|
||
for (var idx = 0; idx < length; idx++, start += step) {
|
||
range[idx] = start;
|
||
}
|
||
|
||
return range;
|
||
};
|
||
|
||
// Function (ahem) Functions
|
||
// ------------------
|
||
|
||
// Reusable constructor function for prototype setting.
|
||
var Ctor = function(){};
|
||
|
||
// Create a function bound to a given object (assigning `this`, and arguments,
|
||
// optionally). Delegates to **ECMAScript 5**'s native `Function.bind` if
|
||
// available.
|
||
_.bind = function(func, context) {
|
||
var args, bound;
|
||
if (nativeBind && func.bind === nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));
|
||
if (!_.isFunction(func)) throw new TypeError('Bind must be called on a function');
|
||
args = slice.call(arguments, 2);
|
||
bound = function() {
|
||
if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments)));
|
||
Ctor.prototype = func.prototype;
|
||
var self = new Ctor;
|
||
Ctor.prototype = null;
|
||
var result = func.apply(self, args.concat(slice.call(arguments)));
|
||
if (_.isObject(result)) return result;
|
||
return self;
|
||
};
|
||
return bound;
|
||
};
|
||
|
||
// Partially apply a function by creating a version that has had some of its
|
||
// arguments pre-filled, without changing its dynamic `this` context. _ acts
|
||
// as a placeholder, allowing any combination of arguments to be pre-filled.
|
||
_.partial = function(func) {
|
||
var boundArgs = slice.call(arguments, 1);
|
||
return function() {
|
||
var position = 0;
|
||
var args = boundArgs.slice();
|
||
for (var i = 0, length = args.length; i < length; i++) {
|
||
if (args[i] === _) args[i] = arguments[position++];
|
||
}
|
||
while (position < arguments.length) args.push(arguments[position++]);
|
||
return func.apply(this, args);
|
||
};
|
||
};
|
||
|
||
// Bind a number of an object's methods to that object. Remaining arguments
|
||
// are the method names to be bound. Useful for ensuring that all callbacks
|
||
// defined on an object belong to it.
|
||
_.bindAll = function(obj) {
|
||
var i, length = arguments.length, key;
|
||
if (length <= 1) throw new Error('bindAll must be passed function names');
|
||
for (i = 1; i < length; i++) {
|
||
key = arguments[i];
|
||
obj[key] = _.bind(obj[key], obj);
|
||
}
|
||
return obj;
|
||
};
|
||
|
||
// Memoize an expensive function by storing its results.
|
||
_.memoize = function(func, hasher) {
|
||
var memoize = function(key) {
|
||
var cache = memoize.cache;
|
||
var address = hasher ? hasher.apply(this, arguments) : key;
|
||
if (!_.has(cache, address)) cache[address] = func.apply(this, arguments);
|
||
return cache[address];
|
||
};
|
||
memoize.cache = {};
|
||
return memoize;
|
||
};
|
||
|
||
// Delays a function for the given number of milliseconds, and then calls
|
||
// it with the arguments supplied.
|
||
_.delay = function(func, wait) {
|
||
var args = slice.call(arguments, 2);
|
||
return setTimeout(function(){
|
||
return func.apply(null, args);
|
||
}, wait);
|
||
};
|
||
|
||
// Defers a function, scheduling it to run after the current call stack has
|
||
// cleared.
|
||
_.defer = function(func) {
|
||
return _.delay.apply(_, [func, 1].concat(slice.call(arguments, 1)));
|
||
};
|
||
|
||
// Returns a function, that, when invoked, will only be triggered at most once
|
||
// during a given window of time. Normally, the throttled function will run
|
||
// as much as it can, without ever going more than once per `wait` duration;
|
||
// but if you'd like to disable the execution on the leading edge, pass
|
||
// `{leading: false}`. To disable execution on the trailing edge, ditto.
|
||
_.throttle = function(func, wait, options) {
|
||
var context, args, result;
|
||
var timeout = null;
|
||
var previous = 0;
|
||
if (!options) options = {};
|
||
var later = function() {
|
||
previous = options.leading === false ? 0 : _.now();
|
||
timeout = null;
|
||
result = func.apply(context, args);
|
||
if (!timeout) context = args = null;
|
||
};
|
||
return function() {
|
||
var now = _.now();
|
||
if (!previous && options.leading === false) previous = now;
|
||
var remaining = wait - (now - previous);
|
||
context = this;
|
||
args = arguments;
|
||
if (remaining <= 0 || remaining > wait) {
|
||
clearTimeout(timeout);
|
||
timeout = null;
|
||
previous = now;
|
||
result = func.apply(context, args);
|
||
if (!timeout) context = args = null;
|
||
} else if (!timeout && options.trailing !== false) {
|
||
timeout = setTimeout(later, remaining);
|
||
}
|
||
return result;
|
||
};
|
||
};
|
||
|
||
// Returns a function, that, as long as it continues to be invoked, will not
|
||
// be triggered. The function will be called after it stops being called for
|
||
// N milliseconds. If `immediate` is passed, trigger the function on the
|
||
// leading edge, instead of the trailing.
|
||
_.debounce = function(func, wait, immediate) {
|
||
var timeout, args, context, timestamp, result;
|
||
|
||
var later = function() {
|
||
var last = _.now() - timestamp;
|
||
|
||
if (last < wait && last > 0) {
|
||
timeout = setTimeout(later, wait - last);
|
||
} else {
|
||
timeout = null;
|
||
if (!immediate) {
|
||
result = func.apply(context, args);
|
||
if (!timeout) context = args = null;
|
||
}
|
||
}
|
||
};
|
||
|
||
return function() {
|
||
context = this;
|
||
args = arguments;
|
||
timestamp = _.now();
|
||
var callNow = immediate && !timeout;
|
||
if (!timeout) timeout = setTimeout(later, wait);
|
||
if (callNow) {
|
||
result = func.apply(context, args);
|
||
context = args = null;
|
||
}
|
||
|
||
return result;
|
||
};
|
||
};
|
||
|
||
// Returns the first function passed as an argument to the second,
|
||
// allowing you to adjust arguments, run code before and after, and
|
||
// conditionally execute the original function.
|
||
_.wrap = function(func, wrapper) {
|
||
return _.partial(wrapper, func);
|
||
};
|
||
|
||
// Returns a negated version of the passed-in predicate.
|
||
_.negate = function(predicate) {
|
||
return function() {
|
||
return !predicate.apply(this, arguments);
|
||
};
|
||
};
|
||
|
||
// Returns a function that is the composition of a list of functions, each
|
||
// consuming the return value of the function that follows.
|
||
_.compose = function() {
|
||
var args = arguments;
|
||
var start = args.length - 1;
|
||
return function() {
|
||
var i = start;
|
||
var result = args[start].apply(this, arguments);
|
||
while (i--) result = args[i].call(this, result);
|
||
return result;
|
||
};
|
||
};
|
||
|
||
// Returns a function that will only be executed after being called N times.
|
||
_.after = function(times, func) {
|
||
return function() {
|
||
if (--times < 1) {
|
||
return func.apply(this, arguments);
|
||
}
|
||
};
|
||
};
|
||
|
||
// Returns a function that will only be executed before being called N times.
|
||
_.before = function(times, func) {
|
||
var memo;
|
||
return function() {
|
||
if (--times > 0) {
|
||
memo = func.apply(this, arguments);
|
||
} else {
|
||
func = null;
|
||
}
|
||
return memo;
|
||
};
|
||
};
|
||
|
||
// Returns a function that will be executed at most one time, no matter how
|
||
// often you call it. Useful for lazy initialization.
|
||
_.once = _.partial(_.before, 2);
|
||
|
||
// Object Functions
|
||
// ----------------
|
||
|
||
// Retrieve the names of an object's properties.
|
||
// Delegates to **ECMAScript 5**'s native `Object.keys`
|
||
_.keys = function(obj) {
|
||
if (!_.isObject(obj)) return [];
|
||
if (nativeKeys) return nativeKeys(obj);
|
||
var keys = [];
|
||
for (var key in obj) if (_.has(obj, key)) keys.push(key);
|
||
return keys;
|
||
};
|
||
|
||
// Retrieve the values of an object's properties.
|
||
_.values = function(obj) {
|
||
var keys = _.keys(obj);
|
||
var length = keys.length;
|
||
var values = Array(length);
|
||
for (var i = 0; i < length; i++) {
|
||
values[i] = obj[keys[i]];
|
||
}
|
||
return values;
|
||
};
|
||
|
||
// Convert an object into a list of `[key, value]` pairs.
|
||
_.pairs = function(obj) {
|
||
var keys = _.keys(obj);
|
||
var length = keys.length;
|
||
var pairs = Array(length);
|
||
for (var i = 0; i < length; i++) {
|
||
pairs[i] = [keys[i], obj[keys[i]]];
|
||
}
|
||
return pairs;
|
||
};
|
||
|
||
// Invert the keys and values of an object. The values must be serializable.
|
||
_.invert = function(obj) {
|
||
var result = {};
|
||
var keys = _.keys(obj);
|
||
for (var i = 0, length = keys.length; i < length; i++) {
|
||
result[obj[keys[i]]] = keys[i];
|
||
}
|
||
return result;
|
||
};
|
||
|
||
// Return a sorted list of the function names available on the object.
|
||
// Aliased as `methods`
|
||
_.functions = _.methods = function(obj) {
|
||
var names = [];
|
||
for (var key in obj) {
|
||
if (_.isFunction(obj[key])) names.push(key);
|
||
}
|
||
return names.sort();
|
||
};
|
||
|
||
// Extend a given object with all the properties in passed-in object(s).
|
||
_.extend = function(obj) {
|
||
if (!_.isObject(obj)) return obj;
|
||
var source, prop;
|
||
for (var i = 1, length = arguments.length; i < length; i++) {
|
||
source = arguments[i];
|
||
for (prop in source) {
|
||
if (hasOwnProperty.call(source, prop)) {
|
||
obj[prop] = source[prop];
|
||
}
|
||
}
|
||
}
|
||
return obj;
|
||
};
|
||
|
||
// Return a copy of the object only containing the whitelisted properties.
|
||
_.pick = function(obj, iteratee, context) {
|
||
var result = {}, key;
|
||
if (obj == null) return result;
|
||
if (_.isFunction(iteratee)) {
|
||
iteratee = createCallback(iteratee, context);
|
||
for (key in obj) {
|
||
var value = obj[key];
|
||
if (iteratee(value, key, obj)) result[key] = value;
|
||
}
|
||
} else {
|
||
var keys = concat.apply([], slice.call(arguments, 1));
|
||
obj = new Object(obj);
|
||
for (var i = 0, length = keys.length; i < length; i++) {
|
||
key = keys[i];
|
||
if (key in obj) result[key] = obj[key];
|
||
}
|
||
}
|
||
return result;
|
||
};
|
||
|
||
// Return a copy of the object without the blacklisted properties.
|
||
_.omit = function(obj, iteratee, context) {
|
||
if (_.isFunction(iteratee)) {
|
||
iteratee = _.negate(iteratee);
|
||
} else {
|
||
var keys = _.map(concat.apply([], slice.call(arguments, 1)), String);
|
||
iteratee = function(value, key) {
|
||
return !_.contains(keys, key);
|
||
};
|
||
}
|
||
return _.pick(obj, iteratee, context);
|
||
};
|
||
|
||
// Fill in a given object with default properties.
|
||
_.defaults = function(obj) {
|
||
if (!_.isObject(obj)) return obj;
|
||
for (var i = 1, length = arguments.length; i < length; i++) {
|
||
var source = arguments[i];
|
||
for (var prop in source) {
|
||
if (obj[prop] === void 0) obj[prop] = source[prop];
|
||
}
|
||
}
|
||
return obj;
|
||
};
|
||
|
||
// Create a (shallow-cloned) duplicate of an object.
|
||
_.clone = function(obj) {
|
||
if (!_.isObject(obj)) return obj;
|
||
return _.isArray(obj) ? obj.slice() : _.extend({}, obj);
|
||
};
|
||
|
||
// Invokes interceptor with the obj, and then returns obj.
|
||
// The primary purpose of this method is to "tap into" a method chain, in
|
||
// order to perform operations on intermediate results within the chain.
|
||
_.tap = function(obj, interceptor) {
|
||
interceptor(obj);
|
||
return obj;
|
||
};
|
||
|
||
// Internal recursive comparison function for `isEqual`.
|
||
var eq = function(a, b, aStack, bStack) {
|
||
// Identical objects are equal. `0 === -0`, but they aren't identical.
|
||
// See the [Harmony `egal` proposal](http://wiki.ecmascript.org/doku.php?id=harmony:egal).
|
||
if (a === b) return a !== 0 || 1 / a === 1 / b;
|
||
// A strict comparison is necessary because `null == undefined`.
|
||
if (a == null || b == null) return a === b;
|
||
// Unwrap any wrapped objects.
|
||
if (a instanceof _) a = a._wrapped;
|
||
if (b instanceof _) b = b._wrapped;
|
||
// Compare `[[Class]]` names.
|
||
var className = toString.call(a);
|
||
if (className !== toString.call(b)) return false;
|
||
switch (className) {
|
||
// Strings, numbers, regular expressions, dates, and booleans are compared by value.
|
||
case '[object RegExp]':
|
||
// RegExps are coerced to strings for comparison (Note: '' + /a/i === '/a/i')
|
||
case '[object String]':
|
||
// Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
|
||
// equivalent to `new String("5")`.
|
||
return '' + a === '' + b;
|
||
case '[object Number]':
|
||
// `NaN`s are equivalent, but non-reflexive.
|
||
// Object(NaN) is equivalent to NaN
|
||
if (+a !== +a) return +b !== +b;
|
||
// An `egal` comparison is performed for other numeric values.
|
||
return +a === 0 ? 1 / +a === 1 / b : +a === +b;
|
||
case '[object Date]':
|
||
case '[object Boolean]':
|
||
// Coerce dates and booleans to numeric primitive values. Dates are compared by their
|
||
// millisecond representations. Note that invalid dates with millisecond representations
|
||
// of `NaN` are not equivalent.
|
||
return +a === +b;
|
||
}
|
||
if (typeof a != 'object' || typeof b != 'object') return false;
|
||
// Assume equality for cyclic structures. The algorithm for detecting cyclic
|
||
// structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
|
||
var length = aStack.length;
|
||
while (length--) {
|
||
// Linear search. Performance is inversely proportional to the number of
|
||
// unique nested structures.
|
||
if (aStack[length] === a) return bStack[length] === b;
|
||
}
|
||
// Objects with different constructors are not equivalent, but `Object`s
|
||
// from different frames are.
|
||
var aCtor = a.constructor, bCtor = b.constructor;
|
||
if (
|
||
aCtor !== bCtor &&
|
||
// Handle Object.create(x) cases
|
||
'constructor' in a && 'constructor' in b &&
|
||
!(_.isFunction(aCtor) && aCtor instanceof aCtor &&
|
||
_.isFunction(bCtor) && bCtor instanceof bCtor)
|
||
) {
|
||
return false;
|
||
}
|
||
// Add the first object to the stack of traversed objects.
|
||
aStack.push(a);
|
||
bStack.push(b);
|
||
var size, result;
|
||
// Recursively compare objects and arrays.
|
||
if (className === '[object Array]') {
|
||
// Compare array lengths to determine if a deep comparison is necessary.
|
||
size = a.length;
|
||
result = size === b.length;
|
||
if (result) {
|
||
// Deep compare the contents, ignoring non-numeric properties.
|
||
while (size--) {
|
||
if (!(result = eq(a[size], b[size], aStack, bStack))) break;
|
||
}
|
||
}
|
||
} else {
|
||
// Deep compare objects.
|
||
var keys = _.keys(a), key;
|
||
size = keys.length;
|
||
// Ensure that both objects contain the same number of properties before comparing deep equality.
|
||
result = _.keys(b).length === size;
|
||
if (result) {
|
||
while (size--) {
|
||
// Deep compare each member
|
||
key = keys[size];
|
||
if (!(result = _.has(b, key) && eq(a[key], b[key], aStack, bStack))) break;
|
||
}
|
||
}
|
||
}
|
||
// Remove the first object from the stack of traversed objects.
|
||
aStack.pop();
|
||
bStack.pop();
|
||
return result;
|
||
};
|
||
|
||
// Perform a deep comparison to check if two objects are equal.
|
||
_.isEqual = function(a, b) {
|
||
return eq(a, b, [], []);
|
||
};
|
||
|
||
// Is a given array, string, or object empty?
|
||
// An "empty" object has no enumerable own-properties.
|
||
_.isEmpty = function(obj) {
|
||
if (obj == null) return true;
|
||
if (_.isArray(obj) || _.isString(obj) || _.isArguments(obj)) return obj.length === 0;
|
||
for (var key in obj) if (_.has(obj, key)) return false;
|
||
return true;
|
||
};
|
||
|
||
// Is a given value a DOM element?
|
||
_.isElement = function(obj) {
|
||
return !!(obj && obj.nodeType === 1);
|
||
};
|
||
|
||
// Is a given value an array?
|
||
// Delegates to ECMA5's native Array.isArray
|
||
_.isArray = nativeIsArray || function(obj) {
|
||
return toString.call(obj) === '[object Array]';
|
||
};
|
||
|
||
// Is a given variable an object?
|
||
_.isObject = function(obj) {
|
||
var type = typeof obj;
|
||
return type === 'function' || type === 'object' && !!obj;
|
||
};
|
||
|
||
// Add some isType methods: isArguments, isFunction, isString, isNumber, isDate, isRegExp.
|
||
_.each(['Arguments', 'Function', 'String', 'Number', 'Date', 'RegExp'], function(name) {
|
||
_['is' + name] = function(obj) {
|
||
return toString.call(obj) === '[object ' + name + ']';
|
||
};
|
||
});
|
||
|
||
// Define a fallback version of the method in browsers (ahem, IE), where
|
||
// there isn't any inspectable "Arguments" type.
|
||
if (!_.isArguments(arguments)) {
|
||
_.isArguments = function(obj) {
|
||
return _.has(obj, 'callee');
|
||
};
|
||
}
|
||
|
||
// Optimize `isFunction` if appropriate. Work around an IE 11 bug.
|
||
if (typeof /./ !== 'function') {
|
||
_.isFunction = function(obj) {
|
||
return typeof obj == 'function' || false;
|
||
};
|
||
}
|
||
|
||
// Is a given object a finite number?
|
||
_.isFinite = function(obj) {
|
||
return isFinite(obj) && !isNaN(parseFloat(obj));
|
||
};
|
||
|
||
// Is the given value `NaN`? (NaN is the only number which does not equal itself).
|
||
_.isNaN = function(obj) {
|
||
return _.isNumber(obj) && obj !== +obj;
|
||
};
|
||
|
||
// Is a given value a boolean?
|
||
_.isBoolean = function(obj) {
|
||
return obj === true || obj === false || toString.call(obj) === '[object Boolean]';
|
||
};
|
||
|
||
// Is a given value equal to null?
|
||
_.isNull = function(obj) {
|
||
return obj === null;
|
||
};
|
||
|
||
// Is a given variable undefined?
|
||
_.isUndefined = function(obj) {
|
||
return obj === void 0;
|
||
};
|
||
|
||
// Shortcut function for checking if an object has a given property directly
|
||
// on itself (in other words, not on a prototype).
|
||
_.has = function(obj, key) {
|
||
return obj != null && hasOwnProperty.call(obj, key);
|
||
};
|
||
|
||
// Utility Functions
|
||
// -----------------
|
||
|
||
// Run Underscore.js in *noConflict* mode, returning the `_` variable to its
|
||
// previous owner. Returns a reference to the Underscore object.
|
||
_.noConflict = function() {
|
||
root._ = previousUnderscore;
|
||
return this;
|
||
};
|
||
|
||
// Keep the identity function around for default iteratees.
|
||
_.identity = function(value) {
|
||
return value;
|
||
};
|
||
|
||
_.constant = function(value) {
|
||
return function() {
|
||
return value;
|
||
};
|
||
};
|
||
|
||
_.noop = function(){};
|
||
|
||
_.property = function(key) {
|
||
return function(obj) {
|
||
return obj[key];
|
||
};
|
||
};
|
||
|
||
// Returns a predicate for checking whether an object has a given set of `key:value` pairs.
|
||
_.matches = function(attrs) {
|
||
var pairs = _.pairs(attrs), length = pairs.length;
|
||
return function(obj) {
|
||
if (obj == null) return !length;
|
||
obj = new Object(obj);
|
||
for (var i = 0; i < length; i++) {
|
||
var pair = pairs[i], key = pair[0];
|
||
if (pair[1] !== obj[key] || !(key in obj)) return false;
|
||
}
|
||
return true;
|
||
};
|
||
};
|
||
|
||
// Run a function **n** times.
|
||
_.times = function(n, iteratee, context) {
|
||
var accum = Array(Math.max(0, n));
|
||
iteratee = createCallback(iteratee, context, 1);
|
||
for (var i = 0; i < n; i++) accum[i] = iteratee(i);
|
||
return accum;
|
||
};
|
||
|
||
// Return a random integer between min and max (inclusive).
|
||
_.random = function(min, max) {
|
||
if (max == null) {
|
||
max = min;
|
||
min = 0;
|
||
}
|
||
return min + Math.floor(Math.random() * (max - min + 1));
|
||
};
|
||
|
||
// A (possibly faster) way to get the current timestamp as an integer.
|
||
_.now = Date.now || function() {
|
||
return new Date().getTime();
|
||
};
|
||
|
||
// List of HTML entities for escaping.
|
||
var escapeMap = {
|
||
'&': '&',
|
||
'<': '<',
|
||
'>': '>',
|
||
'"': '"',
|
||
"'": ''',
|
||
'`': '`'
|
||
};
|
||
var unescapeMap = _.invert(escapeMap);
|
||
|
||
// Functions for escaping and unescaping strings to/from HTML interpolation.
|
||
var createEscaper = function(map) {
|
||
var escaper = function(match) {
|
||
return map[match];
|
||
};
|
||
// Regexes for identifying a key that needs to be escaped
|
||
var source = '(?:' + _.keys(map).join('|') + ')';
|
||
var testRegexp = RegExp(source);
|
||
var replaceRegexp = RegExp(source, 'g');
|
||
return function(string) {
|
||
string = string == null ? '' : '' + string;
|
||
return testRegexp.test(string) ? string.replace(replaceRegexp, escaper) : string;
|
||
};
|
||
};
|
||
_.escape = createEscaper(escapeMap);
|
||
_.unescape = createEscaper(unescapeMap);
|
||
|
||
// If the value of the named `property` is a function then invoke it with the
|
||
// `object` as context; otherwise, return it.
|
||
_.result = function(object, property) {
|
||
if (object == null) return void 0;
|
||
var value = object[property];
|
||
return _.isFunction(value) ? object[property]() : value;
|
||
};
|
||
|
||
// Generate a unique integer id (unique within the entire client session).
|
||
// Useful for temporary DOM ids.
|
||
var idCounter = 0;
|
||
_.uniqueId = function(prefix) {
|
||
var id = ++idCounter + '';
|
||
return prefix ? prefix + id : id;
|
||
};
|
||
|
||
// By default, Underscore uses ERB-style template delimiters, change the
|
||
// following template settings to use alternative delimiters.
|
||
_.templateSettings = {
|
||
evaluate : /<%([\s\S]+?)%>/g,
|
||
interpolate : /<%=([\s\S]+?)%>/g,
|
||
escape : /<%-([\s\S]+?)%>/g
|
||
};
|
||
|
||
// When customizing `templateSettings`, if you don't want to define an
|
||
// interpolation, evaluation or escaping regex, we need one that is
|
||
// guaranteed not to match.
|
||
var noMatch = /(.)^/;
|
||
|
||
// Certain characters need to be escaped so that they can be put into a
|
||
// string literal.
|
||
var escapes = {
|
||
"'": "'",
|
||
'\\': '\\',
|
||
'\r': 'r',
|
||
'\n': 'n',
|
||
'\u2028': 'u2028',
|
||
'\u2029': 'u2029'
|
||
};
|
||
|
||
var escaper = /\\|'|\r|\n|\u2028|\u2029/g;
|
||
|
||
var escapeChar = function(match) {
|
||
return '\\' + escapes[match];
|
||
};
|
||
|
||
// JavaScript micro-templating, similar to John Resig's implementation.
|
||
// Underscore templating handles arbitrary delimiters, preserves whitespace,
|
||
// and correctly escapes quotes within interpolated code.
|
||
// NB: `oldSettings` only exists for backwards compatibility.
|
||
_.template = function(text, settings, oldSettings) {
|
||
if (!settings && oldSettings) settings = oldSettings;
|
||
settings = _.defaults({}, settings, _.templateSettings);
|
||
|
||
// Combine delimiters into one regular expression via alternation.
|
||
var matcher = RegExp([
|
||
(settings.escape || noMatch).source,
|
||
(settings.interpolate || noMatch).source,
|
||
(settings.evaluate || noMatch).source
|
||
].join('|') + '|$', 'g');
|
||
|
||
// Compile the template source, escaping string literals appropriately.
|
||
var index = 0;
|
||
var source = "__p+='";
|
||
text.replace(matcher, function(match, escape, interpolate, evaluate, offset) {
|
||
source += text.slice(index, offset).replace(escaper, escapeChar);
|
||
index = offset + match.length;
|
||
|
||
if (escape) {
|
||
source += "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'";
|
||
} else if (interpolate) {
|
||
source += "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'";
|
||
} else if (evaluate) {
|
||
source += "';\n" + evaluate + "\n__p+='";
|
||
}
|
||
|
||
// Adobe VMs need the match returned to produce the correct offest.
|
||
return match;
|
||
});
|
||
source += "';\n";
|
||
|
||
// If a variable is not specified, place data values in local scope.
|
||
if (!settings.variable) source = 'with(obj||{}){\n' + source + '}\n';
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source = "var __t,__p='',__j=Array.prototype.join," +
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"print=function(){__p+=__j.call(arguments,'');};\n" +
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source + 'return __p;\n';
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try {
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var render = new Function(settings.variable || 'obj', '_', source);
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e.source = source;
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var obj = this._wrapped;
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method.apply(obj, arguments);
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// Add all accessor Array functions to the wrapper.
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_.each(['concat', 'join', 'slice'], function(name) {
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// as a named module because, like jQuery, it is a base library that is
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// popular enough to be bundled in a third party lib, but not be part of
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// an AMD load request. Those cases could generate an error when an
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// anonymous define() is called outside of a loader request.
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define('underscore', [], function() {
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return _;
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});
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with a peer. \n    @sync_process_order = []\n    \n  #\n  # Execute a function _when_ we are connected. If not connected, wait until connected.\n  # @param f {Function} Will be executed on the PeerJs-Connector context.\n  #\n  whenSynced: (args)->\n    if @is_synced\n      args[0].apply this, args[1..]\n    else\n      @compute_when_synced.push args \n  \n  #\n  # Execute an function _when_ a message is received.\n  # @param f {Function} Will be executed on the PeerJs-Connector context. f will be called with (sender_id, broadcast {true|false}, message).\n  #\n  whenReceiving: (f)->\n    @receive_handlers.push f\n  \n  #\n  # Send a message to a (sub)-set of all connected peers.\n  # @param peers {Array<connection_ids>} A set of ids.\n  # @param message {Object} The message to send.\n  #\n  multicast: (peers, message)->\n    @whenSynced [_send, peers, message]\n  \n  #\n  # Send a message to one of the connected peers.\n  # @param peers {connection_id} A connection id.\n  # @param message {Object} The message to send.\n  #\n  unicast: (peer, message)->\n    @whenSynced [_send, peer, message]\n  \n  # \n  # Broadcast a message to all connected peers.\n  # @param message {Object} The message to broadcast.\n  # \n  broadcast: (message)->\n    @whenSynced [()=>\n      for peerid,peer of @connections\n        @_send peerid, message]\n \n  #\n  # Define how you want to handle the sync process of two users.\n  # This is a synchronous handshake. Every user will perform exactly the same actions at the same time. E.g.\n  # @example\n  #   whenSyncing(function(){ // first call must not have parameters!\n  #       return this.id; // Send the id of this connector.\n  #   },function(peerid){ // you receive the peerid of the other connections.\n  #       // you can do something with the peerid\n  #       // return \"you are my friend\"; // you could send another massage.\n  #   }); // this is the end of the sync process.\n  #\n  whenSyncing: ()->\n    for i in [(arguments.length-1)..0]\n      @sync_process_order.unshift arguments[i]\n\n\n\nmodule.exports = Connector\n","\n_ = require \"underscore\"\nConnector = require '../connector'\n\n#\n# A trivial Connector that simulates network delay.\n#\nclass TestConnector extends Connector\n\n  #\n  # @param id {String} Some unique id\n  # @param user_connectors {Array<TestConnector>} List of TestConnectors instances\n  #\n  constructor: (@id)->\n    super()\n    # If you think of operations, this will mirror the \n    # execiton order of operations (when a message is send, or received it is put into this)\n    @execution_order = []\n    # The messages are buffered under the name of teh sending user.\n    @receive_buffer = {}\n    @connections = {}\n\n    @whenReceiving (user, message)=>\n      @execution_order.push message\n    \n  # join another user connector\n  join: (conn)->\n    @_addConnection conn.id, conn\n    for cid,c of conn.connections\n      @_addConnection cid, c\n    @is_synced = true\n    for comp in @compute_when_synced\n      comp[0].apply @, comp[1..]\n    \n  \n  #\n  # @private\n  # This is a helper function that is only related to the peerjs connector. \n  # Connect to another peer.\n  _addConnection: (id, user_connector)->\n    if not @connections[id]?\n      data = null\n      user_data = null\n      for i in [0...@sync_process_order.length]\n        data_ = @sync_process_order[i].call @, user_data\n        user_data = user_connector.sync_process_order[0].call user_connector, data\n        data = data_\n      @connections[id]=user_connector\n      user_connector.connections[@id] = @\n      \n  #\n  # Get the ops in the execution order.\n  #\n  getOpsInExecutionOrder: ()->\n    @execution_order\n    \n  #\n  # Send a message to another peer\n  # @param {Operation} o The operation that was executed.\n  #\n  _send: (uid, message)->\n    rb = @connections[uid].receive_buffer\n    rb[@id] ?= []\n    rb[@id].push message\n\n  #\n  # Flush one operation from the line of a specific user.\n  #\n  flushOne: (uid)->\n    if @receive_buffer[uid]?.length > 0\n      message = @receive_buffer[uid].shift()\n      for f in @receive_handlers\n        f uid, message\n        \n  #\n  # Flush one operation on a random line.\n  #\n  flushOneRandom: ()->\n    connlist = for cid,c of @receive_buffer\n      cid\n    @flushOne connlist[(_.random 0, (connlist.length-1))]\n\n  #\n  # Flush all operations on every line.\n  #\n  flushAll: ()->\n    for n,messages of @receive_buffer\n      for message in messages\n        for f in @receive_handlers\n          f n, message\n    @receive_buffer = {}\n\n\nif window?\n  window.TestConnector = TestConnector\n\nif module?\n  module.exports = TestConnector\n","//     Underscore.js 1.7.0\n//     http://underscorejs.org\n//     (c) 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n//     Underscore may be freely distributed under the MIT license.\n\n(function() {\n\n  // Baseline setup\n  // --------------\n\n  // Establish the root object, `window` in the browser, or `exports` on the server.\n  var root = this;\n\n  // Save the previous value of the `_` variable.\n  var previousUnderscore = root._;\n\n  // Save bytes in the minified (but not gzipped) version:\n  var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype;\n\n  // Create quick reference variables for speed access to core prototypes.\n  var\n    push             = ArrayProto.push,\n    slice            = ArrayProto.slice,\n    concat           = ArrayProto.concat,\n    toString         = ObjProto.toString,\n    hasOwnProperty   = ObjProto.hasOwnProperty;\n\n  // All **ECMAScript 5** native function implementations that we hope to use\n  // are declared here.\n  var\n    nativeIsArray      = Array.isArray,\n    nativeKeys         = Object.keys,\n    nativeBind         = FuncProto.bind;\n\n  // Create a safe reference to the Underscore object for use below.\n  var _ = function(obj) {\n    if (obj instanceof _) return obj;\n    if (!(this instanceof _)) return new _(obj);\n    this._wrapped = obj;\n  };\n\n  // Export the Underscore object for **Node.js**, with\n  // backwards-compatibility for the old `require()` API. If we're in\n  // the browser, add `_` as a global object.\n  if (typeof exports !== 'undefined') {\n    if (typeof module !== 'undefined' && module.exports) {\n      exports = module.exports = _;\n    }\n    exports._ = _;\n  } else {\n    root._ = _;\n  }\n\n  // Current version.\n  _.VERSION = '1.7.0';\n\n  // Internal function that returns an efficient (for current engines) version\n  // of the passed-in callback, to be repeatedly applied in other Underscore\n  // functions.\n  var createCallback = function(func, context, argCount) {\n    if (context === void 0) return func;\n    switch (argCount == null ? 3 : argCount) {\n      case 1: return function(value) {\n        return func.call(context, value);\n      };\n      case 2: return function(value, other) {\n        return func.call(context, value, other);\n      };\n      case 3: return function(value, index, collection) {\n        return func.call(context, value, index, collection);\n      };\n      case 4: return function(accumulator, value, index, collection) {\n        return func.call(context, accumulator, value, index, collection);\n      };\n    }\n    return function() {\n      return func.apply(context, arguments);\n    };\n  };\n\n  // A mostly-internal function to generate callbacks that can be applied\n  // to each element in a collection, returning the desired result — either\n  // identity, an arbitrary callback, a property matcher, or a property accessor.\n  _.iteratee = function(value, context, argCount) {\n    if (value == null) return _.identity;\n    if (_.isFunction(value)) return createCallback(value, context, argCount);\n    if (_.isObject(value)) return _.matches(value);\n    return _.property(value);\n  };\n\n  // Collection Functions\n  // --------------------\n\n  // The cornerstone, an `each` implementation, aka `forEach`.\n  // Handles raw objects in addition to array-likes. Treats all\n  // sparse array-likes as if they were dense.\n  _.each = _.forEach = function(obj, iteratee, context) {\n    if (obj == null) return obj;\n    iteratee = createCallback(iteratee, context);\n    var i, length = obj.length;\n    if (length === +length) {\n      for (i = 0; i < length; i++) {\n        iteratee(obj[i], i, obj);\n      }\n    } else {\n      var keys = _.keys(obj);\n      for (i = 0, length = keys.length; i < length; i++) {\n        iteratee(obj[keys[i]], keys[i], obj);\n      }\n    }\n    return obj;\n  };\n\n  // Return the results of applying the iteratee to each element.\n  _.map = _.collect = function(obj, iteratee, context) {\n    if (obj == null) return [];\n    iteratee = _.iteratee(iteratee, context);\n    var keys = obj.length !== +obj.length && _.keys(obj),\n        length = (keys || obj).length,\n        results = Array(length),\n        currentKey;\n    for (var index = 0; index < length; index++) {\n      currentKey = keys ? keys[index] : index;\n      results[index] = iteratee(obj[currentKey], currentKey, obj);\n    }\n    return results;\n  };\n\n  var reduceError = 'Reduce of empty array with no initial value';\n\n  // **Reduce** builds up a single result from a list of values, aka `inject`,\n  // or `foldl`.\n  _.reduce = _.foldl = _.inject = function(obj, iteratee, memo, context) {\n    if (obj == null) obj = [];\n    iteratee = createCallback(iteratee, context, 4);\n    var keys = obj.length !== +obj.length && _.keys(obj),\n        length = (keys || obj).length,\n        index = 0, currentKey;\n    if (arguments.length < 3) {\n      if (!length) throw new TypeError(reduceError);\n      memo = obj[keys ? keys[index++] : index++];\n    }\n    for (; index < length; index++) {\n      currentKey = keys ? keys[index] : index;\n      memo = iteratee(memo, obj[currentKey], currentKey, obj);\n    }\n    return memo;\n  };\n\n  // The right-associative version of reduce, also known as `foldr`.\n  _.reduceRight = _.foldr = function(obj, iteratee, memo, context) {\n    if (obj == null) obj = [];\n    iteratee = createCallback(iteratee, context, 4);\n    var keys = obj.length !== + obj.length && _.keys(obj),\n        index = (keys || obj).length,\n        currentKey;\n    if (arguments.length < 3) {\n      if (!index) throw new TypeError(reduceError);\n      memo = obj[keys ? keys[--index] : --index];\n    }\n    while (index--) {\n      currentKey = keys ? keys[index] : index;\n      memo = iteratee(memo, obj[currentKey], currentKey, obj);\n    }\n    return memo;\n  };\n\n  // Return the first value which passes a truth test. Aliased as `detect`.\n  _.find = _.detect = function(obj, predicate, context) {\n    var result;\n    predicate = _.iteratee(predicate, context);\n    _.some(obj, function(value, index, list) {\n      if (predicate(value, index, list)) {\n        result = value;\n        return true;\n      }\n    });\n    return result;\n  };\n\n  // Return all the elements that pass a truth test.\n  // Aliased as `select`.\n  _.filter = _.select = function(obj, predicate, context) {\n    var results = [];\n    if (obj == null) return results;\n    predicate = _.iteratee(predicate, context);\n    _.each(obj, function(value, index, list) {\n      if (predicate(value, index, list)) results.push(value);\n    });\n    return results;\n  };\n\n  // Return all the elements for which a truth test fails.\n  _.reject = function(obj, predicate, context) {\n    return _.filter(obj, _.negate(_.iteratee(predicate)), context);\n  };\n\n  // Determine whether all of the elements match a truth test.\n  // Aliased as `all`.\n  _.every = _.all = function(obj, predicate, context) {\n    if (obj == null) return true;\n    predicate = _.iteratee(predicate, context);\n    var keys = obj.length !== +obj.length && _.keys(obj),\n        length = (keys || obj).length,\n        index, currentKey;\n    for (index = 0; index < length; index++) {\n      currentKey = keys ? keys[index] : index;\n      if (!predicate(obj[currentKey], currentKey, obj)) return false;\n    }\n    return true;\n  };\n\n  // Determine if at least one element in the object matches a truth test.\n  // Aliased as `any`.\n  _.some = _.any = function(obj, predicate, context) {\n    if (obj == null) return false;\n    predicate = _.iteratee(predicate, context);\n    var keys = obj.length !== +obj.length && _.keys(obj),\n        length = (keys || obj).length,\n        index, currentKey;\n    for (index = 0; index < length; index++) {\n      currentKey = keys ? keys[index] : index;\n      if (predicate(obj[currentKey], currentKey, obj)) return true;\n    }\n    return false;\n  };\n\n  // Determine if the array or object contains a given value (using `===`).\n  // Aliased as `include`.\n  _.contains = _.include = function(obj, target) {\n    if (obj == null) return false;\n    if (obj.length !== +obj.length) obj = _.values(obj);\n    return _.indexOf(obj, target) >= 0;\n  };\n\n  // Invoke a method (with arguments) on every item in a collection.\n  _.invoke = function(obj, method) {\n    var args = slice.call(arguments, 2);\n    var isFunc = _.isFunction(method);\n    return _.map(obj, function(value) {\n      return (isFunc ? method : value[method]).apply(value, args);\n    });\n  };\n\n  // Convenience version of a common use case of `map`: fetching a property.\n  _.pluck = function(obj, key) {\n    return _.map(obj, _.property(key));\n  };\n\n  // Convenience version of a common use case of `filter`: selecting only objects\n  // containing specific `key:value` pairs.\n  _.where = function(obj, attrs) {\n    return _.filter(obj, _.matches(attrs));\n  };\n\n  // Convenience version of a common use case of `find`: getting the first object\n  // containing specific `key:value` pairs.\n  _.findWhere = function(obj, attrs) {\n    return _.find(obj, _.matches(attrs));\n  };\n\n  // Return the maximum element (or element-based computation).\n  _.max = function(obj, iteratee, context) {\n    var result = -Infinity, lastComputed = -Infinity,\n        value, computed;\n    if (iteratee == null && obj != null) {\n      obj = obj.length === +obj.length ? obj : _.values(obj);\n      for (var i = 0, length = obj.length; i < length; i++) {\n        value = obj[i];\n        if (value > result) {\n          result = value;\n        }\n      }\n    } else {\n      iteratee = _.iteratee(iteratee, context);\n      _.each(obj, function(value, index, list) {\n        computed = iteratee(value, index, list);\n        if (computed > lastComputed || computed === -Infinity && result === -Infinity) {\n          result = value;\n          lastComputed = computed;\n        }\n      });\n    }\n    return result;\n  };\n\n  // Return the minimum element (or element-based computation).\n  _.min = function(obj, iteratee, context) {\n    var result = Infinity, lastComputed = Infinity,\n        value, computed;\n    if (iteratee == null && obj != null) {\n      obj = obj.length === +obj.length ? obj : _.values(obj);\n      for (var i = 0, length = obj.length; i < length; i++) {\n        value = obj[i];\n        if (value < result) {\n          result = value;\n        }\n      }\n    } else {\n      iteratee = _.iteratee(iteratee, context);\n      _.each(obj, function(value, index, list) {\n        computed = iteratee(value, index, list);\n        if (computed < lastComputed || computed === Infinity && result === Infinity) {\n          result = value;\n          lastComputed = computed;\n        }\n      });\n    }\n    return result;\n  };\n\n  // Shuffle a collection, using the modern version of the\n  // [Fisher-Yates shuffle](http://en.wikipedia.org/wiki/Fisher–Yates_shuffle).\n  _.shuffle = function(obj) {\n    var set = obj && obj.length === +obj.length ? obj : _.values(obj);\n    var length = set.length;\n    var shuffled = Array(length);\n    for (var index = 0, rand; index < length; index++) {\n      rand = _.random(0, index);\n      if (rand !== index) shuffled[index] = shuffled[rand];\n      shuffled[rand] = set[index];\n    }\n    return shuffled;\n  };\n\n  // Sample **n** random values from a collection.\n  // If **n** is not specified, returns a single random element.\n  // The internal `guard` argument allows it to work with `map`.\n  _.sample = function(obj, n, guard) {\n    if (n == null || guard) {\n      if (obj.length !== +obj.length) obj = _.values(obj);\n      return obj[_.random(obj.length - 1)];\n    }\n    return _.shuffle(obj).slice(0, Math.max(0, n));\n  };\n\n  // Sort the object's values by a criterion produced by an iteratee.\n  _.sortBy = function(obj, iteratee, context) {\n    iteratee = _.iteratee(iteratee, context);\n    return _.pluck(_.map(obj, function(value, index, list) {\n      return {\n        value: value,\n        index: index,\n        criteria: iteratee(value, index, list)\n      };\n    }).sort(function(left, right) {\n      var a = left.criteria;\n      var b = right.criteria;\n      if (a !== b) {\n        if (a > b || a === void 0) return 1;\n        if (a < b || b === void 0) return -1;\n      }\n      return left.index - right.index;\n    }), 'value');\n  };\n\n  // An internal function used for aggregate \"group by\" operations.\n  var group = function(behavior) {\n    return function(obj, iteratee, context) {\n      var result = {};\n      iteratee = _.iteratee(iteratee, context);\n      _.each(obj, function(value, index) {\n        var key = iteratee(value, index, obj);\n        behavior(result, value, key);\n      });\n      return result;\n    };\n  };\n\n  // Groups the object's values by a criterion. Pass either a string attribute\n  // to group by, or a function that returns the criterion.\n  _.groupBy = group(function(result, value, key) {\n    if (_.has(result, key)) result[key].push(value); else result[key] = [value];\n  });\n\n  // Indexes the object's values by a criterion, similar to `groupBy`, but for\n  // when you know that your index values will be unique.\n  _.indexBy = group(function(result, value, key) {\n    result[key] = value;\n  });\n\n  // Counts instances of an object that group by a certain criterion. Pass\n  // either a string attribute to count by, or a function that returns the\n  // criterion.\n  _.countBy = group(function(result, value, key) {\n    if (_.has(result, key)) result[key]++; else result[key] = 1;\n  });\n\n  // Use a comparator function to figure out the smallest index at which\n  // an object should be inserted so as to maintain order. Uses binary search.\n  _.sortedIndex = function(array, obj, iteratee, context) {\n    iteratee = _.iteratee(iteratee, context, 1);\n    var value = iteratee(obj);\n    var low = 0, high = array.length;\n    while (low < high) {\n      var mid = low + high >>> 1;\n      if (iteratee(array[mid]) < value) low = mid + 1; else high = mid;\n    }\n    return low;\n  };\n\n  // Safely create a real, live array from anything iterable.\n  _.toArray = function(obj) {\n    if (!obj) return [];\n    if (_.isArray(obj)) return slice.call(obj);\n    if (obj.length === +obj.length) return _.map(obj, _.identity);\n    return _.values(obj);\n  };\n\n  // Return the number of elements in an object.\n  _.size = function(obj) {\n    if (obj == null) return 0;\n    return obj.length === +obj.length ? obj.length : _.keys(obj).length;\n  };\n\n  // Split a collection into two arrays: one whose elements all satisfy the given\n  // predicate, and one whose elements all do not satisfy the predicate.\n  _.partition = function(obj, predicate, context) {\n    predicate = _.iteratee(predicate, context);\n    var pass = [], fail = [];\n    _.each(obj, function(value, key, obj) {\n      (predicate(value, key, obj) ? pass : fail).push(value);\n    });\n    return [pass, fail];\n  };\n\n  // Array Functions\n  // ---------------\n\n  // Get the first element of an array. Passing **n** will return the first N\n  // values in the array. Aliased as `head` and `take`. The **guard** check\n  // allows it to work with `_.map`.\n  _.first = _.head = _.take = function(array, n, guard) {\n    if (array == null) return void 0;\n    if (n == null || guard) return array[0];\n    if (n < 0) return [];\n    return slice.call(array, 0, n);\n  };\n\n  // Returns everything but the last entry of the array. Especially useful on\n  // the arguments object. Passing **n** will return all the values in\n  // the array, excluding the last N. The **guard** check allows it to work with\n  // `_.map`.\n  _.initial = function(array, n, guard) {\n    return slice.call(array, 0, Math.max(0, array.length - (n == null || guard ? 1 : n)));\n  };\n\n  // Get the last element of an array. Passing **n** will return the last N\n  // values in the array. The **guard** check allows it to work with `_.map`.\n  _.last = function(array, n, guard) {\n    if (array == null) return void 0;\n    if (n == null || guard) return array[array.length - 1];\n    return slice.call(array, Math.max(array.length - n, 0));\n  };\n\n  // Returns everything but the first entry of the array. Aliased as `tail` and `drop`.\n  // Especially useful on the arguments object. Passing an **n** will return\n  // the rest N values in the array. The **guard**\n  // check allows it to work with `_.map`.\n  _.rest = _.tail = _.drop = function(array, n, guard) {\n    return slice.call(array, n == null || guard ? 1 : n);\n  };\n\n  // Trim out all falsy values from an array.\n  _.compact = function(array) {\n    return _.filter(array, _.identity);\n  };\n\n  // Internal implementation of a recursive `flatten` function.\n  var flatten = function(input, shallow, strict, output) {\n    if (shallow && _.every(input, _.isArray)) {\n      return concat.apply(output, input);\n    }\n    for (var i = 0, length = input.length; i < length; i++) {\n      var value = input[i];\n      if (!_.isArray(value) && !_.isArguments(value)) {\n        if (!strict) output.push(value);\n      } else if (shallow) {\n        push.apply(output, value);\n      } else {\n        flatten(value, shallow, strict, output);\n      }\n    }\n    return output;\n  };\n\n  // Flatten out an array, either recursively (by default), or just one level.\n  _.flatten = function(array, shallow) {\n    return flatten(array, shallow, false, []);\n  };\n\n  // Return a version of the array that does not contain the specified value(s).\n  _.without = function(array) {\n    return _.difference(array, slice.call(arguments, 1));\n  };\n\n  // Produce a duplicate-free version of the array. If the array has already\n  // been sorted, you have the option of using a faster algorithm.\n  // Aliased as `unique`.\n  _.uniq = _.unique = function(array, isSorted, iteratee, context) {\n    if (array == null) return [];\n    if (!_.isBoolean(isSorted)) {\n      context = iteratee;\n      iteratee = isSorted;\n      isSorted = false;\n    }\n    if (iteratee != null) iteratee = _.iteratee(iteratee, context);\n    var result = [];\n    var seen = [];\n    for (var i = 0, length = array.length; i < length; i++) {\n      var value = array[i];\n      if (isSorted) {\n        if (!i || seen !== value) result.push(value);\n        seen = value;\n      } else if (iteratee) {\n        var computed = iteratee(value, i, array);\n        if (_.indexOf(seen, computed) < 0) {\n          seen.push(computed);\n          result.push(value);\n        }\n      } else if (_.indexOf(result, value) < 0) {\n        result.push(value);\n      }\n    }\n    return result;\n  };\n\n  // Produce an array that contains the union: each distinct element from all of\n  // the passed-in arrays.\n  _.union = function() {\n    return _.uniq(flatten(arguments, true, true, []));\n  };\n\n  // Produce an array that contains every item shared between all the\n  // passed-in arrays.\n  _.intersection = function(array) {\n    if (array == null) return [];\n    var result = [];\n    var argsLength = arguments.length;\n    for (var i = 0, length = array.length; i < length; i++) {\n      var item = array[i];\n      if (_.contains(result, item)) continue;\n      for (var j = 1; j < argsLength; j++) {\n        if (!_.contains(arguments[j], item)) break;\n      }\n      if (j === argsLength) result.push(item);\n    }\n    return result;\n  };\n\n  // Take the difference between one array and a number of other arrays.\n  // Only the elements present in just the first array will remain.\n  _.difference = function(array) {\n    var rest = flatten(slice.call(arguments, 1), true, true, []);\n    return _.filter(array, function(value){\n      return !_.contains(rest, value);\n    });\n  };\n\n  // Zip together multiple lists into a single array -- elements that share\n  // an index go together.\n  _.zip = function(array) {\n    if (array == null) return [];\n    var length = _.max(arguments, 'length').length;\n    var results = Array(length);\n    for (var i = 0; i < length; i++) {\n      results[i] = _.pluck(arguments, i);\n    }\n    return results;\n  };\n\n  // Converts lists into objects. Pass either a single array of `[key, value]`\n  // pairs, or two parallel arrays of the same length -- one of keys, and one of\n  // the corresponding values.\n  _.object = function(list, values) {\n    if (list == null) return {};\n    var result = {};\n    for (var i = 0, length = list.length; i < length; i++) {\n      if (values) {\n        result[list[i]] = values[i];\n      } else {\n        result[list[i][0]] = list[i][1];\n      }\n    }\n    return result;\n  };\n\n  // Return the position of the first occurrence of an item in an array,\n  // or -1 if the item is not included in the array.\n  // If the array is large and already in sort order, pass `true`\n  // for **isSorted** to use binary search.\n  _.indexOf = function(array, item, isSorted) {\n    if (array == null) return -1;\n    var i = 0, length = array.length;\n    if (isSorted) {\n      if (typeof isSorted == 'number') {\n        i = isSorted < 0 ? Math.max(0, length + isSorted) : isSorted;\n      } else {\n        i = _.sortedIndex(array, item);\n        return array[i] === item ? i : -1;\n      }\n    }\n    for (; i < length; i++) if (array[i] === item) return i;\n    return -1;\n  };\n\n  _.lastIndexOf = function(array, item, from) {\n    if (array == null) return -1;\n    var idx = array.length;\n    if (typeof from == 'number') {\n      idx = from < 0 ? idx + from + 1 : Math.min(idx, from + 1);\n    }\n    while (--idx >= 0) if (array[idx] === item) return idx;\n    return -1;\n  };\n\n  // Generate an integer Array containing an arithmetic progression. A port of\n  // the native Python `range()` function. See\n  // [the Python documentation](http://docs.python.org/library/functions.html#range).\n  _.range = function(start, stop, step) {\n    if (arguments.length <= 1) {\n      stop = start || 0;\n      start = 0;\n    }\n    step = step || 1;\n\n    var length = Math.max(Math.ceil((stop - start) / step), 0);\n    var range = Array(length);\n\n    for (var idx = 0; idx < length; idx++, start += step) {\n      range[idx] = start;\n    }\n\n    return range;\n  };\n\n  // Function (ahem) Functions\n  // ------------------\n\n  // Reusable constructor function for prototype setting.\n  var Ctor = function(){};\n\n  // Create a function bound to a given object (assigning `this`, and arguments,\n  // optionally). Delegates to **ECMAScript 5**'s native `Function.bind` if\n  // available.\n  _.bind = function(func, context) {\n    var args, bound;\n    if (nativeBind && func.bind === nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));\n    if (!_.isFunction(func)) throw new TypeError('Bind must be called on a function');\n    args = slice.call(arguments, 2);\n    bound = function() {\n      if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments)));\n      Ctor.prototype = func.prototype;\n      var self = new Ctor;\n      Ctor.prototype = null;\n      var result = func.apply(self, args.concat(slice.call(arguments)));\n      if (_.isObject(result)) return result;\n      return self;\n    };\n    return bound;\n  };\n\n  // Partially apply a function by creating a version that has had some of its\n  // arguments pre-filled, without changing its dynamic `this` context. _ acts\n  // as a placeholder, allowing any combination of arguments to be pre-filled.\n  _.partial = function(func) {\n    var boundArgs = slice.call(arguments, 1);\n    return function() {\n      var position = 0;\n      var args = boundArgs.slice();\n      for (var i = 0, length = args.length; i < length; i++) {\n        if (args[i] === _) args[i] = arguments[position++];\n      }\n      while (position < arguments.length) args.push(arguments[position++]);\n      return func.apply(this, args);\n    };\n  };\n\n  // Bind a number of an object's methods to that object. Remaining arguments\n  // are the method names to be bound. Useful for ensuring that all callbacks\n  // defined on an object belong to it.\n  _.bindAll = function(obj) {\n    var i, length = arguments.length, key;\n    if (length <= 1) throw new Error('bindAll must be passed function names');\n    for (i = 1; i < length; i++) {\n      key = arguments[i];\n      obj[key] = _.bind(obj[key], obj);\n    }\n    return obj;\n  };\n\n  // Memoize an expensive function by storing its results.\n  _.memoize = function(func, hasher) {\n    var memoize = function(key) {\n      var cache = memoize.cache;\n      var address = hasher ? hasher.apply(this, arguments) : key;\n      if (!_.has(cache, address)) cache[address] = func.apply(this, arguments);\n      return cache[address];\n    };\n    memoize.cache = {};\n    return memoize;\n  };\n\n  // Delays a function for the given number of milliseconds, and then calls\n  // it with the arguments supplied.\n  _.delay = function(func, wait) {\n    var args = slice.call(arguments, 2);\n    return setTimeout(function(){\n      return func.apply(null, args);\n    }, wait);\n  };\n\n  // Defers a function, scheduling it to run after the current call stack has\n  // cleared.\n  _.defer = function(func) {\n    return _.delay.apply(_, [func, 1].concat(slice.call(arguments, 1)));\n  };\n\n  // Returns a function, that, when invoked, will only be triggered at most once\n  // during a given window of time. Normally, the throttled function will run\n  // as much as it can, without ever going more than once per `wait` duration;\n  // but if you'd like to disable the execution on the leading edge, pass\n  // `{leading: false}`. To disable execution on the trailing edge, ditto.\n  _.throttle = function(func, wait, options) {\n    var context, args, result;\n    var timeout = null;\n    var previous = 0;\n    if (!options) options = {};\n    var later = function() {\n      previous = options.leading === false ? 0 : _.now();\n      timeout = null;\n      result = func.apply(context, args);\n      if (!timeout) context = args = null;\n    };\n    return function() {\n      var now = _.now();\n      if (!previous && options.leading === false) previous = now;\n      var remaining = wait - (now - previous);\n      context = this;\n      args = arguments;\n      if (remaining <= 0 || remaining > wait) {\n        clearTimeout(timeout);\n        timeout = null;\n        previous = now;\n        result = func.apply(context, args);\n        if (!timeout) context = args = null;\n      } else if (!timeout && options.trailing !== false) {\n        timeout = setTimeout(later, remaining);\n      }\n      return result;\n    };\n  };\n\n  // Returns a function, that, as long as it continues to be invoked, will not\n  // be triggered. The function will be called after it stops being called for\n  // N milliseconds. If `immediate` is passed, trigger the function on the\n  // leading edge, instead of the trailing.\n  _.debounce = function(func, wait, immediate) {\n    var timeout, args, context, timestamp, result;\n\n    var later = function() {\n      var last = _.now() - timestamp;\n\n      if (last < wait && last > 0) {\n        timeout = setTimeout(later, wait - last);\n      } else {\n        timeout = null;\n        if (!immediate) {\n          result = func.apply(context, args);\n          if (!timeout) context = args = null;\n        }\n      }\n    };\n\n    return function() {\n      context = this;\n      args = arguments;\n      timestamp = _.now();\n      var callNow = immediate && !timeout;\n      if (!timeout) timeout = setTimeout(later, wait);\n      if (callNow) {\n        result = func.apply(context, args);\n        context = args = null;\n      }\n\n      return result;\n    };\n  };\n\n  // Returns the first function passed as an argument to the second,\n  // allowing you to adjust arguments, run code before and after, and\n  // conditionally execute the original function.\n  _.wrap = function(func, wrapper) {\n    return _.partial(wrapper, func);\n  };\n\n  // Returns a negated version of the passed-in predicate.\n  _.negate = function(predicate) {\n    return function() {\n      return !predicate.apply(this, arguments);\n    };\n  };\n\n  // Returns a function that is the composition of a list of functions, each\n  // consuming the return value of the function that follows.\n  _.compose = function() {\n    var args = arguments;\n    var start = args.length - 1;\n    return function() {\n      var i = start;\n      var result = args[start].apply(this, arguments);\n      while (i--) result = args[i].call(this, result);\n      return result;\n    };\n  };\n\n  // Returns a function that will only be executed after being called N times.\n  _.after = function(times, func) {\n    return function() {\n      if (--times < 1) {\n        return func.apply(this, arguments);\n      }\n    };\n  };\n\n  // Returns a function that will only be executed before being called N times.\n  _.before = function(times, func) {\n    var memo;\n    return function() {\n      if (--times > 0) {\n        memo = func.apply(this, arguments);\n      } else {\n        func = null;\n      }\n      return memo;\n    };\n  };\n\n  // Returns a function that will be executed at most one time, no matter how\n  // often you call it. Useful for lazy initialization.\n  _.once = _.partial(_.before, 2);\n\n  // Object Functions\n  // ----------------\n\n  // Retrieve the names of an object's properties.\n  // Delegates to **ECMAScript 5**'s native `Object.keys`\n  _.keys = function(obj) {\n    if (!_.isObject(obj)) return [];\n    if (nativeKeys) return nativeKeys(obj);\n    var keys = [];\n    for (var key in obj) if (_.has(obj, key)) keys.push(key);\n    return keys;\n  };\n\n  // Retrieve the values of an object's properties.\n  _.values = function(obj) {\n    var keys = _.keys(obj);\n    var length = keys.length;\n    var values = Array(length);\n    for (var i = 0; i < length; i++) {\n      values[i] = obj[keys[i]];\n    }\n    return values;\n  };\n\n  // Convert an object into a list of `[key, value]` pairs.\n  _.pairs = function(obj) {\n    var keys = _.keys(obj);\n    var length = keys.length;\n    var pairs = Array(length);\n    for (var i = 0; i < length; i++) {\n      pairs[i] = [keys[i], obj[keys[i]]];\n    }\n    return pairs;\n  };\n\n  // Invert the keys and values of an object. The values must be serializable.\n  _.invert = function(obj) {\n    var result = {};\n    var keys = _.keys(obj);\n    for (var i = 0, length = keys.length; i < length; i++) {\n      result[obj[keys[i]]] = keys[i];\n    }\n    return result;\n  };\n\n  // Return a sorted list of the function names available on the object.\n  // Aliased as `methods`\n  _.functions = _.methods = function(obj) {\n    var names = [];\n    for (var key in obj) {\n      if (_.isFunction(obj[key])) names.push(key);\n    }\n    return names.sort();\n  };\n\n  // Extend a given object with all the properties in passed-in object(s).\n  _.extend = function(obj) {\n    if (!_.isObject(obj)) return obj;\n    var source, prop;\n    for (var i = 1, length = arguments.length; i < length; i++) {\n      source = arguments[i];\n      for (prop in source) {\n        if (hasOwnProperty.call(source, prop)) {\n            obj[prop] = source[prop];\n        }\n      }\n    }\n    return obj;\n  };\n\n  // Return a copy of the object only containing the whitelisted properties.\n  _.pick = function(obj, iteratee, context) {\n    var result = {}, key;\n    if (obj == null) return result;\n    if (_.isFunction(iteratee)) {\n      iteratee = createCallback(iteratee, context);\n      for (key in obj) {\n        var value = obj[key];\n        if (iteratee(value, key, obj)) result[key] = value;\n      }\n    } else {\n      var keys = concat.apply([], slice.call(arguments, 1));\n      obj = new Object(obj);\n      for (var i = 0, length = keys.length; i < length; i++) {\n        key = keys[i];\n        if (key in obj) result[key] = obj[key];\n      }\n    }\n    return result;\n  };\n\n   // Return a copy of the object without the blacklisted properties.\n  _.omit = function(obj, iteratee, context) {\n    if (_.isFunction(iteratee)) {\n      iteratee = _.negate(iteratee);\n    } else {\n      var keys = _.map(concat.apply([], slice.call(arguments, 1)), String);\n      iteratee = function(value, key) {\n        return !_.contains(keys, key);\n      };\n    }\n    return _.pick(obj, iteratee, context);\n  };\n\n  // Fill in a given object with default properties.\n  _.defaults = function(obj) {\n    if (!_.isObject(obj)) return obj;\n    for (var i = 1, length = arguments.length; i < length; i++) {\n      var source = arguments[i];\n      for (var prop in source) {\n        if (obj[prop] === void 0) obj[prop] = source[prop];\n      }\n    }\n    return obj;\n  };\n\n  // Create a (shallow-cloned) duplicate of an object.\n  _.clone = function(obj) {\n    if (!_.isObject(obj)) return obj;\n    return _.isArray(obj) ? obj.slice() : _.extend({}, obj);\n  };\n\n  // Invokes interceptor with the obj, and then returns obj.\n  // The primary purpose of this method is to \"tap into\" a method chain, in\n  // order to perform operations on intermediate results within the chain.\n  _.tap = function(obj, interceptor) {\n    interceptor(obj);\n    return obj;\n  };\n\n  // Internal recursive comparison function for `isEqual`.\n  var eq = function(a, b, aStack, bStack) {\n    // Identical objects are equal. `0 === -0`, but they aren't identical.\n    // See the [Harmony `egal` proposal](http://wiki.ecmascript.org/doku.php?id=harmony:egal).\n    if (a === b) return a !== 0 || 1 / a === 1 / b;\n    // A strict comparison is necessary because `null == undefined`.\n    if (a == null || b == null) return a === b;\n    // Unwrap any wrapped objects.\n    if (a instanceof _) a = a._wrapped;\n    if (b instanceof _) b = b._wrapped;\n    // Compare `[[Class]]` names.\n    var className = toString.call(a);\n    if (className !== toString.call(b)) return false;\n    switch (className) {\n      // Strings, numbers, regular expressions, dates, and booleans are compared by value.\n      case '[object RegExp]':\n      // RegExps are coerced to strings for comparison (Note: '' + /a/i === '/a/i')\n      case '[object String]':\n        // Primitives and their corresponding object wrappers are equivalent; thus, `\"5\"` is\n        // equivalent to `new String(\"5\")`.\n        return '' + a === '' + b;\n      case '[object Number]':\n        // `NaN`s are equivalent, but non-reflexive.\n        // Object(NaN) is equivalent to NaN\n        if (+a !== +a) return +b !== +b;\n        // An `egal` comparison is performed for other numeric values.\n        return +a === 0 ? 1 / +a === 1 / b : +a === +b;\n      case '[object Date]':\n      case '[object Boolean]':\n        // Coerce dates and booleans to numeric primitive values. Dates are compared by their\n        // millisecond representations. Note that invalid dates with millisecond representations\n        // of `NaN` are not equivalent.\n        return +a === +b;\n    }\n    if (typeof a != 'object' || typeof b != 'object') return false;\n    // Assume equality for cyclic structures. The algorithm for detecting cyclic\n    // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.\n    var length = aStack.length;\n    while (length--) {\n      // Linear search. Performance is inversely proportional to the number of\n      // unique nested structures.\n      if (aStack[length] === a) return bStack[length] === b;\n    }\n    // Objects with different constructors are not equivalent, but `Object`s\n    // from different frames are.\n    var aCtor = a.constructor, bCtor = b.constructor;\n    if (\n      aCtor !== bCtor &&\n      // Handle Object.create(x) cases\n      'constructor' in a && 'constructor' in b &&\n      !(_.isFunction(aCtor) && aCtor instanceof aCtor &&\n        _.isFunction(bCtor) && bCtor instanceof bCtor)\n    ) {\n      return false;\n    }\n    // Add the first object to the stack of traversed objects.\n    aStack.push(a);\n    bStack.push(b);\n    var size, result;\n    // Recursively compare objects and arrays.\n    if (className === '[object Array]') {\n      // Compare array lengths to determine if a deep comparison is necessary.\n      size = a.length;\n      result = size === b.length;\n      if (result) {\n        // Deep compare the contents, ignoring non-numeric properties.\n        while (size--) {\n          if (!(result = eq(a[size], b[size], aStack, bStack))) break;\n        }\n      }\n    } else {\n      // Deep compare objects.\n      var keys = _.keys(a), key;\n      size = keys.length;\n      // Ensure that both objects contain the same number of properties before comparing deep equality.\n      result = _.keys(b).length === size;\n      if (result) {\n        while (size--) {\n          // Deep compare each member\n          key = keys[size];\n          if (!(result = _.has(b, key) && eq(a[key], b[key], aStack, bStack))) break;\n        }\n      }\n    }\n    // Remove the first object from the stack of traversed objects.\n    aStack.pop();\n    bStack.pop();\n    return result;\n  };\n\n  // Perform a deep comparison to check if two objects are equal.\n  _.isEqual = function(a, b) {\n    return eq(a, b, [], []);\n  };\n\n  // Is a given array, string, or object empty?\n  // An \"empty\" object has no enumerable own-properties.\n  _.isEmpty = function(obj) {\n    if (obj == null) return true;\n    if (_.isArray(obj) || _.isString(obj) || _.isArguments(obj)) return obj.length === 0;\n    for (var key in obj) if (_.has(obj, key)) return false;\n    return true;\n  };\n\n  // Is a given value a DOM element?\n  _.isElement = function(obj) {\n    return !!(obj && obj.nodeType === 1);\n  };\n\n  // Is a given value an array?\n  // Delegates to ECMA5's native Array.isArray\n  _.isArray = nativeIsArray || function(obj) {\n    return toString.call(obj) === '[object Array]';\n  };\n\n  // Is a given variable an object?\n  _.isObject = function(obj) {\n    var type = typeof obj;\n    return type === 'function' || type === 'object' && !!obj;\n  };\n\n  // Add some isType methods: isArguments, isFunction, isString, isNumber, isDate, isRegExp.\n  _.each(['Arguments', 'Function', 'String', 'Number', 'Date', 'RegExp'], function(name) {\n    _['is' + name] = function(obj) {\n      return toString.call(obj) === '[object ' + name + ']';\n    };\n  });\n\n  // Define a fallback version of the method in browsers (ahem, IE), where\n  // there isn't any inspectable \"Arguments\" type.\n  if (!_.isArguments(arguments)) {\n    _.isArguments = function(obj) {\n      return _.has(obj, 'callee');\n    };\n  }\n\n  // Optimize `isFunction` if appropriate. Work around an IE 11 bug.\n  if (typeof /./ !== 'function') {\n    _.isFunction = function(obj) {\n      return typeof obj == 'function' || false;\n    };\n  }\n\n  // Is a given object a finite number?\n  _.isFinite = function(obj) {\n    return isFinite(obj) && !isNaN(parseFloat(obj));\n  };\n\n  // Is the given value `NaN`? (NaN is the only number which does not equal itself).\n  _.isNaN = function(obj) {\n    return _.isNumber(obj) && obj !== +obj;\n  };\n\n  // Is a given value a boolean?\n  _.isBoolean = function(obj) {\n    return obj === true || obj === false || toString.call(obj) === '[object Boolean]';\n  };\n\n  // Is a given value equal to null?\n  _.isNull = function(obj) {\n    return obj === null;\n  };\n\n  // Is a given variable undefined?\n  _.isUndefined = function(obj) {\n    return obj === void 0;\n  };\n\n  // Shortcut function for checking if an object has a given property directly\n  // on itself (in other words, not on a prototype).\n  _.has = function(obj, key) {\n    return obj != null && hasOwnProperty.call(obj, key);\n  };\n\n  // Utility Functions\n  // -----------------\n\n  // Run Underscore.js in *noConflict* mode, returning the `_` variable to its\n  // previous owner. Returns a reference to the Underscore object.\n  _.noConflict = function() {\n    root._ = previousUnderscore;\n    return this;\n  };\n\n  // Keep the identity function around for default iteratees.\n  _.identity = function(value) {\n    return value;\n  };\n\n  _.constant = function(value) {\n    return function() {\n      return value;\n    };\n  };\n\n  _.noop = function(){};\n\n  _.property = function(key) {\n    return function(obj) {\n      return obj[key];\n    };\n  };\n\n  // Returns a predicate for checking whether an object has a given set of `key:value` pairs.\n  _.matches = function(attrs) {\n    var pairs = _.pairs(attrs), length = pairs.length;\n    return function(obj) {\n      if (obj == null) return !length;\n      obj = new Object(obj);\n      for (var i = 0; i < length; i++) {\n        var pair = pairs[i], key = pair[0];\n        if (pair[1] !== obj[key] || !(key in obj)) return false;\n      }\n      return true;\n    };\n  };\n\n  // Run a function **n** times.\n  _.times = function(n, iteratee, context) {\n    var accum = Array(Math.max(0, n));\n    iteratee = createCallback(iteratee, context, 1);\n    for (var i = 0; i < n; i++) accum[i] = iteratee(i);\n    return accum;\n  };\n\n  // Return a random integer between min and max (inclusive).\n  _.random = function(min, max) {\n    if (max == null) {\n      max = min;\n      min = 0;\n    }\n    return min + Math.floor(Math.random() * (max - min + 1));\n  };\n\n  // A (possibly faster) way to get the current timestamp as an integer.\n  _.now = Date.now || function() {\n    return new Date().getTime();\n  };\n\n   // List of HTML entities for escaping.\n  var escapeMap = {\n    '&': '&amp;',\n    '<': '&lt;',\n    '>': '&gt;',\n    '\"': '&quot;',\n    \"'\": '&#x27;',\n    '`': '&#x60;'\n  };\n  var unescapeMap = _.invert(escapeMap);\n\n  // Functions for escaping and unescaping strings to/from HTML interpolation.\n  var createEscaper = function(map) {\n    var escaper = function(match) {\n      return map[match];\n    };\n    // Regexes for identifying a key that needs to be escaped\n    var source = '(?:' + _.keys(map).join('|') + ')';\n    var testRegexp = RegExp(source);\n    var replaceRegexp = RegExp(source, 'g');\n    return function(string) {\n      string = string == null ? '' : '' + string;\n      return testRegexp.test(string) ? string.replace(replaceRegexp, escaper) : string;\n    };\n  };\n  _.escape = createEscaper(escapeMap);\n  _.unescape = createEscaper(unescapeMap);\n\n  // If the value of the named `property` is a function then invoke it with the\n  // `object` as context; otherwise, return it.\n  _.result = function(object, property) {\n    if (object == null) return void 0;\n    var value = object[property];\n    return _.isFunction(value) ? object[property]() : value;\n  };\n\n  // Generate a unique integer id (unique within the entire client session).\n  // Useful for temporary DOM ids.\n  var idCounter = 0;\n  _.uniqueId = function(prefix) {\n    var id = ++idCounter + '';\n    return prefix ? prefix + id : id;\n  };\n\n  // By default, Underscore uses ERB-style template delimiters, change the\n  // following template settings to use alternative delimiters.\n  _.templateSettings = {\n    evaluate    : /<%([\\s\\S]+?)%>/g,\n    interpolate : /<%=([\\s\\S]+?)%>/g,\n    escape      : /<%-([\\s\\S]+?)%>/g\n  };\n\n  // When customizing `templateSettings`, if you don't want to define an\n  // interpolation, evaluation or escaping regex, we need one that is\n  // guaranteed not to match.\n  var noMatch = /(.)^/;\n\n  // Certain characters need to be escaped so that they can be put into a\n  // string literal.\n  var escapes = {\n    \"'\":      \"'\",\n    '\\\\':     '\\\\',\n    '\\r':     'r',\n    '\\n':     'n',\n    '\\u2028': 'u2028',\n    '\\u2029': 'u2029'\n  };\n\n  var escaper = /\\\\|'|\\r|\\n|\\u2028|\\u2029/g;\n\n  var escapeChar = function(match) {\n    return '\\\\' + escapes[match];\n  };\n\n  // JavaScript micro-templating, similar to John Resig's implementation.\n  // Underscore templating handles arbitrary delimiters, preserves whitespace,\n  // and correctly escapes quotes within interpolated code.\n  // NB: `oldSettings` only exists for backwards compatibility.\n  _.template = function(text, settings, oldSettings) {\n    if (!settings && oldSettings) settings = oldSettings;\n    settings = _.defaults({}, settings, _.templateSettings);\n\n    // Combine delimiters into one regular expression via alternation.\n    var matcher = RegExp([\n      (settings.escape || noMatch).source,\n      (settings.interpolate || noMatch).source,\n      (settings.evaluate || noMatch).source\n    ].join('|') + '|$', 'g');\n\n    // Compile the template source, escaping string literals appropriately.\n    var index = 0;\n    var source = \"__p+='\";\n    text.replace(matcher, function(match, escape, interpolate, evaluate, offset) {\n      source += text.slice(index, offset).replace(escaper, escapeChar);\n      index = offset + match.length;\n\n      if (escape) {\n        source += \"'+\\n((__t=(\" + escape + \"))==null?'':_.escape(__t))+\\n'\";\n      } else if (interpolate) {\n        source += \"'+\\n((__t=(\" + interpolate + \"))==null?'':__t)+\\n'\";\n      } else if (evaluate) {\n        source += \"';\\n\" + evaluate + \"\\n__p+='\";\n      }\n\n      // Adobe VMs need the match returned to produce the correct offest.\n      return match;\n    });\n    source += \"';\\n\";\n\n    // If a variable is not specified, place data values in local scope.\n    if (!settings.variable) source = 'with(obj||{}){\\n' + source + '}\\n';\n\n    source = \"var __t,__p='',__j=Array.prototype.join,\" +\n      \"print=function(){__p+=__j.call(arguments,'');};\\n\" +\n      source + 'return __p;\\n';\n\n    try {\n      var render = new Function(settings.variable || 'obj', '_', source);\n    } catch (e) {\n      e.source = source;\n      throw e;\n    }\n\n    var template = function(data) {\n      return render.call(this, data, _);\n    };\n\n    // Provide the compiled source as a convenience for precompilation.\n    var argument = settings.variable || 'obj';\n    template.source = 'function(' + argument + '){\\n' + source + '}';\n\n    return template;\n  };\n\n  // Add a \"chain\" function. Start chaining a wrapped Underscore object.\n  _.chain = function(obj) {\n    var instance = _(obj);\n    instance._chain = true;\n    return instance;\n  };\n\n  // OOP\n  // ---------------\n  // If Underscore is called as a function, it returns a wrapped object that\n  // can be used OO-style. This wrapper holds altered versions of all the\n  // underscore functions. Wrapped objects may be chained.\n\n  // Helper function to continue chaining intermediate results.\n  var result = function(obj) {\n    return this._chain ? _(obj).chain() : obj;\n  };\n\n  // Add your own custom functions to the Underscore object.\n  _.mixin = function(obj) {\n    _.each(_.functions(obj), function(name) {\n      var func = _[name] = obj[name];\n      _.prototype[name] = function() {\n        var args = [this._wrapped];\n        push.apply(args, arguments);\n        return result.call(this, func.apply(_, args));\n      };\n    });\n  };\n\n  // Add all of the Underscore functions to the wrapper object.\n  _.mixin(_);\n\n  // Add all mutator Array functions to the wrapper.\n  _.each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {\n    var method = ArrayProto[name];\n    _.prototype[name] = function() {\n      var obj = this._wrapped;\n      method.apply(obj, arguments);\n      if ((name === 'shift' || name === 'splice') && obj.length === 0) delete obj[0];\n      return result.call(this, obj);\n    };\n  });\n\n  // Add all accessor Array functions to the wrapper.\n  _.each(['concat', 'join', 'slice'], function(name) {\n    var method = ArrayProto[name];\n    _.prototype[name] = function() {\n      return result.call(this, method.apply(this._wrapped, arguments));\n    };\n  });\n\n  // Extracts the result from a wrapped and chained object.\n  _.prototype.value = function() {\n    return this._wrapped;\n  };\n\n  // AMD registration happens at the end for compatibility with AMD loaders\n  // that may not enforce next-turn semantics on modules. Even though general\n  // practice for AMD registration is to be anonymous, underscore registers\n  // as a named module because, like jQuery, it is a base library that is\n  // popular enough to be bundled in a third party lib, but not be part of\n  // an AMD load request. Those cases could generate an error when an\n  // anonymous define() is called outside of a loader request.\n  if (typeof define === 'function' && define.amd) {\n    define('underscore', [], function() {\n      return _;\n    });\n  }\n}.call(this));\n"]}
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