本Hash类到今天已经进行了又一次修改啦,所以更新下.

var Hash = function(h)
{
this._data = new Object();
}
function Hash$clear()
{
delete this._data;
this._data = new Object();
} 
function Hash$add(key,value)
{
if(!key || typeof(value) === 'undefined') return false; 
this._data[key] =
{key: key,value: value};
return true;
}
function Hash$addRange(h)
{
for(var key in h._data)
{
var item = h._data[key];
if(typeof(item) !== 'undefined')
{
this.add(item.key,item.value);
}
}
}
function Hash$remove(key)
{
if(!key) return undefined;
var item = this._data[key];
delete this._data[key];
return item;
}
function Hash$removeAt(index)
{
if(isNaN(index)) return undefined;
var i = 0; 
for(var key in this._data)
{
if(i == index)
{
return this.remove(key);
}
i++;
}
return undefined;
}
function Hash$removeRange(startIndex,endIndex)
{
if(isNaN(startIndex) || isNaN(endIndex)) return undefined;
var i = 0;
var h = new Hash();
for(var key in this._data)
{
if(i >= startIndex && i<= endIndex)
{
h.add(key,this.remove(key).value);
}
i++;
}
return h;
} 
function Hash$getCount()
{
var i = 0;
for(var key in this._data) i++;
return i;
}
function Hash$forEach(method,instance)
{
var i = 0;
for(var key in this._data)
{
var item = this._data[key];
if(typeof(item) !== 'undefined')
{
method.call(instance, item, i, this);
i++;
}else
{
delete this._data[key];
}
}
}
function Hash$getKeys()
{
var arr = new Array();
for (var key in this._data)
{
var item = this._data[key];
arr.push(item.key);
}
return arr;
}
function Hash$getValues()
{
var arr = new Array();
for (var key in this._data)
{
var item = this._data[key];
arr.push(item.value);
}
return arr;
}
function Hash$getItem(key)
{
if(!key) return undefined;
var item = this._data[key];
if (typeof(item) !== 'undefined')
{
return item; 
}else
{
delete this._data[key];
return undefined;
}
}
function Hash$containsKey(key)
{ 
if(typeof(this.getItem(key)) !== 'undefined')
{
return true;
}
return false;
}
function Hash$containsValue(value)
{
for(var key in this._data)
{ 
if(value === this._data[key].value)
{
return true;
}
}
return false;
}
Hash.prototype =
{
_data : null,
_keys : null,
clear : Hash$clear,
add : Hash$add,
addRange : Hash$addRange,
remove : Hash$remove,
removeAt : Hash$removeAt,
removeRange : Hash$removeRange,
getCount : Hash$getCount,
forEach : Hash$forEach,
getKeys : Hash$getKeys,
getValues : Hash$getValues,
getItem: Hash$getItem,
containsKey: Hash$containsKey,
containsValue: Hash$containsValue
}
Hash.__typeName = 'Hash';
Hash.__class = true;
有需要的朋友请看下,还是比较好用的,如果有BUG或缺陷,欢迎大家留言指正撒~~~
