- Author:
- David Nickerson <nickerso@users.sourceforge.net>
- Date:
- 2009-07-16 02:00:03+12:00
- Desc:
- the starting point for the HH tutorial example
- Permanent Source URI:
- https://models.fieldml.org/workspace/a1/rawfile/f6a8f90307388eb4b040ee3566b84d88b59247f7/dojo-presentation/js/dojo/dojox/collections/_base.js
dojo.provide("dojox.collections._base");
dojox.collections.DictionaryEntry=function(/* string */k, /* object */v){
// summary
// return an object of type dojox.collections.DictionaryEntry
this.key=k;
this.value=v;
this.valueOf=function(){
return this.value; // object
};
this.toString=function(){
return String(this.value); // string
};
}
/* Iterators
* The collections.Iterators (Iterator and DictionaryIterator) are built to
* work with the Collections included in this module. However, they *can*
* be used with arrays and objects, respectively, should one choose to do so.
*/
dojox.collections.Iterator=function(/* array */arr){
// summary
// return an object of type dojox.collections.Iterator
var a=arr;
var position=0;
this.element=a[position]||null;
this.atEnd=function(){
// summary
// Test to see if the internal cursor has reached the end of the internal collection.
return (position>=a.length); // bool
};
this.get=function(){
// summary
// Get the next member in the collection.
if(this.atEnd()){
return null; // object
}
this.element=a[position++];
return this.element; // object
};
this.map=function(/* function */fn, /* object? */scope){
// summary
// Functional iteration with optional scope.
return dojo.map(a, fn, scope);
};
this.reset=function(){
// summary
// reset the internal cursor.
position=0;
this.element=a[position];
};
}
/* Notes:
* The DictionaryIterator no longer supports a key and value property;
* the reality is that you can use this to iterate over a JS object
* being used as a hashtable.
*/
dojox.collections.DictionaryIterator=function(/* object */obj){
// summary
// return an object of type dojox.collections.DictionaryIterator
var a=[]; // Create an indexing array
var testObject={};
for(var p in obj){
if(!testObject[p]){
a.push(obj[p]); // fill it up
}
}
var position=0;
this.element=a[position]||null;
this.atEnd=function(){
// summary
// Test to see if the internal cursor has reached the end of the internal collection.
return (position>=a.length); // bool
};
this.get=function(){
// summary
// Get the next member in the collection.
if(this.atEnd()){
return null; // object
}
this.element=a[position++];
return this.element; // object
};
this.map=function(/* function */fn, /* object? */scope){
// summary
// Functional iteration with optional scope.
return dojo.map(a, fn, scope);
};
this.reset=function() {
// summary
// reset the internal cursor.
position=0;
this.element=a[position];
};
};
