javascript 实现map集合

前几天项目上想用map集合一样的东西，简单拿对象拼了一下子，今天闲的慌实现一下 大家不要见笑

代码

rush:js;"> var Map = function (){ /************基础变量**************/ var hashmap = {}; var keys = []; var vals = []; var entrys = []; var size = 0; var index = {};

var Entry = function(key,value){
var entryKey = key;
var entryValue = value;
this.getKey = function (){
return entryKey;
};
this.getValue = function(){
return entryValue;
};
};
/****基本方法 按字母排序**/
this.clear = function(key) {
hashmap[key] = undefined;
var i = index[key];
entrys.splice(i,1);
vals.splice(i,1);
keys.splice(i,1);
size --;
};

this.entrySet = function() {
return entrys;
};

this.get = function(key){
return hashmap[key];
};

this.isEmpty = function() {
if(hashmap) return true;
return false;
};

this.keySet = function() {
return keys;
};

this.put = function(key,value){
if(!this.get(key)){
entrys.push(new Entry(key,value));
keys.push(key);
vals.push(value);
index[key] = size;
size ++;
} else {
var i = index[key];
entrys[i] = new Entry(key,value);
vals[i] = value;
}
hashmap[key] = value;
};

this.size = function() {
return size;
};

this.values = function() {
return vals;
};
};
/****扩展方法**/
Map.prototype = {
containsKey : function(key) {
if(this.get(key)) return true;
return false;
},putAll : function(set) {
for(var e in set){
if(set[e]){
this.put(e,set[e]);
}
}
},remove : function(key) {
var v = this.get(key);
this.clear(key);
return v;
}
};
var h = new Map();
h.put('a',10);
h.put('b',11);
h.put('c',3);
h.put('d',5);
console.info(h.size());
h.clear('a');
console.info(h.containsKey('a'));
console.info(h.containsKey('b'));
console.info(h.size());

console.log(h.entrySet());
console.log(h.keySet());
console.log(h.values());

for(var i in h.entrySet()){
var obj = h.entrySet()[i];
console.log(obj.getKey() + ":" + obj.getValue());
}

以上所述就是本文的全部内容了，希望大家能够喜欢。