Posted on 2007-02-06 09:08
沧桑雨迢迢 阅读(2235)
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Javascript
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~~~