added comments to most of the classes.

src/OperationStores/Memory.js

@@ -1,15 +1,6 @@
 /* global Y */
 'use strict'
 
-function copyObject (o) {
-  var c = {}
-  for (var key in o) {
-    c[key] = o[key]
-  }
-  return c
-}
-Y.utils.copyObject = copyObject
-
 class DeleteStore extends Y.utils.RBTree {
   constructor () {
     super()
@@ -120,8 +111,8 @@ class DeleteStore extends Y.utils.RBTree {
 
 Y.utils.DeleteStore = DeleteStore
 
-Y.Memory = (function () { // eslint-disable-line no-unused-vars
-  class Transaction extends Y.AbstractTransaction { // eslint-disable-line
+Y.Memory = (function () {
+  class Transaction extends Y.AbstractTransaction {
 
     constructor (store) {
       super(store)
@@ -144,28 +135,25 @@ Y.Memory = (function () { // eslint-disable-line no-unused-vars
     * getOpsFromDeleteSet (ds) {
       return this.ds.getDeletions(ds)
     }
-    * setOperation (op) { // eslint-disable-line
+    * setOperation (op) {
       // TODO: you can remove this step! probs..
       var n = this.os.findNode(op.id)
       n.val = op
       return op
     }
-    * addOperation (op) { // eslint-disable-line
+    * addOperation (op) {
       this.os.add(op)
     }
-    * getOperation (id) { // eslint-disable-line
-      if (id == null) {
-        throw new Error('You must define id!')
-      }
+    * getOperation (id) {
       return this.os.find(id)
     }
-    * removeOperation (id) { // eslint-disable-line
+    * removeOperation (id) {
       this.os.delete(id)
     }
-    * setState (state) { // eslint-disable-line
+    * setState (state) {
       this.ss[state.user] = state.clock
     }
-    * getState (user) { // eslint-disable-line
+    * getState (user) {
       var clock = this.ss[user]
       if (clock == null) {
         clock = 0
@@ -175,7 +163,7 @@ Y.Memory = (function () { // eslint-disable-line no-unused-vars
         clock: clock
       }
     }
-    * getStateVector () { // eslint-disable-line
+    * getStateVector () {
       var stateVector = []
       for (var user in this.ss) {
         var clock = this.ss[user]
@@ -186,7 +174,7 @@ Y.Memory = (function () { // eslint-disable-line no-unused-vars
       }
       return stateVector
     }
-    * getStateSet () { // eslint-disable-line
+    * getStateSet () {
       return this.ss
     }
     * getOperations (startSS) {
@@ -225,7 +213,7 @@ Y.Memory = (function () { // eslint-disable-line no-unused-vars
     }
     * makeOperationReady (ss, op) {
       // instead of ss, you could use currSS (a ss that increments when you add an operation)
-      op = copyObject(op)
+      op = Y.utils.copyObject(op)
       var o = op
       var clock
       while (o.right != null) {

src/OperationStores/RedBlackTree.js

@@ -1,10 +1,9 @@
 /* global Y */
 'use strict'
 
-function smaller (a, b) {
-  return a[0] < b[0] || (a[0] === b[0] && a[1] < b[1])
-}
-Y.utils.smaller = smaller
+/*
+  This file contains a not so fancy implemantion of a Red Black Tree.
+*/
 
 class N {
   // A created node is always red!
@@ -126,7 +125,7 @@ class N {
   }
 }
 
-class RBTree { // eslint-disable-line no-unused-vars
+class RBTree {
   constructor () {
     this.root = null
     this.length = 0
@@ -140,11 +139,11 @@ class RBTree { // eslint-disable-line no-unused-vars
       return null
     } else {
       while (true) {
-        if ((from === null || smaller(from, o.val.id)) && o.left !== null) {
+        if ((from === null || Y.utils.smaller(from, o.val.id)) && o.left !== null) {
           // o is included in the bound
           // try to find an element that is closer to the bound
           o = o.left
-        } else if (from !== null && smaller(o.val.id, from)) {
+        } else if (from !== null && Y.utils.smaller(o.val.id, from)) {
           // o is not within the bound, maybe one of the right elements is..
           if (o.right !== null) {
             o = o.right
@@ -168,11 +167,11 @@ class RBTree { // eslint-disable-line no-unused-vars
       return null
     } else {
       while (true) {
-        if ((to === null || smaller(o.val.id, to)) && o.right !== null) {
+        if ((to === null || Y.utils.smaller(o.val.id, to)) && o.right !== null) {
           // o is included in the bound
           // try to find an element that is closer to the bound
           o = o.right
-        } else if (to !== null && smaller(to, o.val.id)) {
+        } else if (to !== null && Y.utils.smaller(to, o.val.id)) {
           // o is not within the bound, maybe one of the left elements is..
           if (o.left !== null) {
             o = o.left
@@ -189,7 +188,7 @@ class RBTree { // eslint-disable-line no-unused-vars
   }
   iterate (from, to, f) {
     var o = this.findNodeWithLowerBound(from)
-    while (o !== null && (to === null || smaller(o.val.id, to) || Y.utils.compareIds(o.val.id, to))) {
+    while (o !== null && (to === null || Y.utils.smaller(o.val.id, to) || Y.utils.compareIds(o.val.id, to))) {
       f(o.val)
       o = o.next()
     }
@@ -226,9 +225,9 @@ class RBTree { // eslint-disable-line no-unused-vars
         if (o === null) {
           return false
         }
-        if (smaller(id, o.val.id)) {
+        if (Y.utils.smaller(id, o.val.id)) {
           o = o.left
-        } else if (smaller(o.val.id, id)) {
+        } else if (Y.utils.smaller(o.val.id, id)) {
           o = o.right
         } else {
           return o
@@ -386,14 +385,14 @@ class RBTree { // eslint-disable-line no-unused-vars
     if (this.root !== null) {
       var p = this.root // p abbrev. parent
       while (true) {
-        if (smaller(node.val.id, p.val.id)) {
+        if (Y.utils.smaller(node.val.id, p.val.id)) {
           if (p.left === null) {
             p.left = node
             break
           } else {
             p = p.left
           }
-        } else if (smaller(p.val.id, node.val.id)) {
+        } else if (Y.utils.smaller(p.val.id, node.val.id)) {
           if (p.right === null) {
             p.right = node
             break