build/js/Words.js

   1 \r
   2 var Words = Collection.extend({\r
   3         constructor: function(script) {\r
   4                 this.base();\r
   5                 forEach (script.match(WORDS), this.add, this);\r
   6                 this.encode();\r
   7         },\r
   8         \r
   9         add: function(word) {\r
  10                 if (!this.exists(word)) this.base(word);\r
  11                 word = this.fetch(word);\r
  12                 word.count++;\r
  13                 return word;\r
  14         },\r
  15         \r
  16         encode: function() {\r
  17                 // sort by frequency\r
  18                 this.sort(function(word1, word2) {\r
  19                         return word2.count - word1.count;\r
  20                 });\r
  21                 \r
  22                 eval("var a=62,e=" + Packer.ENCODE62);\r
  23                 var encode = e;         \r
  24                 var encoded = new Collection; // a dictionary of base62 -> base10\r
  25                 var count = this.count();\r
  26                 for (var i = 0; i < count; i++) {\r
  27                         encoded.store(encode(i), i);\r
  28                 }\r
  29                 \r
  30                 var empty = function() {return ""};\r
  31                 var index = 0;\r
  32                 forEach (this, function(word) {\r
  33                         if (encoded.exists(word)) {\r
  34                                 word.index = encoded.fetch(word);\r
  35                                 word.toString = empty;\r
  36                         } else {\r
  37                                 while (this.exists(encode(index))) index++;\r
  38                                 word.index = index++;\r
  39                         }\r
  40                         word.encoded = encode(word.index);\r
  41                 }, this);\r
  42                 \r
  43                 // sort by encoding\r
  44                 this.sort(function(word1, word2) {\r
  45                         return word1.index - word2.index;\r
  46                 });\r
  47         },\r
  48         \r
  49         toString: function() {\r
  50                 return this.values().join("|");\r
  51         }\r
  52 }, {\r
  53         Item: {\r
  54                 constructor: function(word) {\r
  55                         this.toString = function() {return word};\r
  56                 },\r
  57                 \r
  58                 count: 0,\r
  59                 encoded: "",\r
  60                 index: -1\r
  61         }\r
  62 });\r