git.pond.sub.org Git - eow/blob - static/dojo-release-1.1.1/dojox/collections/_base.js

   1 if(!dojo._hasResource["dojox.collections._base"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
   2 dojo._hasResource["dojox.collections._base"] = true;
   3 dojo.provide("dojox.collections._base");
   4
   5 dojox.collections.DictionaryEntry=function(/* string */k, /* object */v){
   6         //      summary
   7         //      return an object of type dojox.collections.DictionaryEntry
   8         this.key=k;
   9         this.value=v;
  10         this.valueOf=function(){
  11                 return this.value;      //      object
  12         };
  13         this.toString=function(){
  14                 return String(this.value);      //      string
  15         };
  16 }
  17
  18 /*      Iterators
  19  *      The collections.Iterators (Iterator and DictionaryIterator) are built to
  20  *      work with the Collections included in this module.  However, they *can*
  21  *      be used with arrays and objects, respectively, should one choose to do so.
  22  */
  23 dojox.collections.Iterator=function(/* array */arr){
  24         //      summary
  25         //      return an object of type dojox.collections.Iterator
  26         var a=arr;
  27         var position=0;
  28         this.element=a[position]||null;
  29         this.atEnd=function(){
  30                 //      summary
  31                 //      Test to see if the internal cursor has reached the end of the internal collection.
  32                 return (position>=a.length);    //      bool
  33         };
  34         this.get=function(){
  35                 //      summary
  36                 //      Get the next member in the collection.
  37                 if(this.atEnd()){
  38                         return null;            //      object
  39                 }
  40                 this.element=a[position++];
  41                 return this.element;    //      object
  42         };
  43         this.map=function(/* function */fn, /* object? */scope){
  44                 //      summary
  45                 //      Functional iteration with optional scope.
  46                 return dojo.map(a, fn, scope);
  47         };
  48         this.reset=function(){
  49                 //      summary
  50                 //      reset the internal cursor.
  51                 position=0;
  52                 this.element=a[position];
  53         };
  54 }
  55
  56 /*      Notes:
  57  *      The DictionaryIterator no longer supports a key and value property;
  58  *      the reality is that you can use this to iterate over a JS object
  59  *      being used as a hashtable.
  60  */
  61 dojox.collections.DictionaryIterator=function(/* object */obj){
  62         //      summary
  63         //      return an object of type dojox.collections.DictionaryIterator
  64         var a=[];       //      Create an indexing array
  65         var testObject={};
  66         for(var p in obj){
  67                 if(!testObject[p]){
  68                         a.push(obj[p]); //      fill it up
  69                 }
  70         }
  71         var position=0;
  72         this.element=a[position]||null;
  73         this.atEnd=function(){
  74                 //      summary
  75                 //      Test to see if the internal cursor has reached the end of the internal collection.
  76                 return (position>=a.length);    //      bool
  77         };
  78         this.get=function(){
  79                 //      summary
  80                 //      Get the next member in the collection.
  81                 if(this.atEnd()){
  82                         return null;            //      object
  83                 }
  84                 this.element=a[position++];
  85                 return this.element;    //      object
  86         };
  87         this.map=function(/* function */fn, /* object? */scope){
  88                 //      summary
  89                 //      Functional iteration with optional scope.
  90                 return dojo.map(a, fn, scope);
  91         };
  92         this.reset=function() {
  93                 //      summary
  94                 //      reset the internal cursor.
  95                 position=0;
  96                 this.element=a[position];
  97         };
  98 };
  99
 100 }