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<title>Untitled Document</title>
<script type="text/javascript" charset="utf-8">
function Map(){
//private 不允许外部访问属性
var obj = {}; //空的对象容器，盛装键值对
this.put = function(key , value){
obj[key] = value; //把键值对象绑定到obj对象
}
//map大小
this.size = function(){
var count = 0;
for(var attr in obj){
count ++;
}
return count;
}
//get 方法 根据key得到value
this.get = function(key){
//处理 0、false
if (obj[key] || obj[key] === 0 || obj[key] == false) {
return obj[key];
}
else{
return null;
}
}
//remove 方法
this.remove = function(key){
if (obj[key] || obj[key] === 0 || obj[key] == false) {
delete obj[key];
}
}
//eachMap 遍历map容器的方法
this.eachMap = function(fn){
for(var attr in obj){
fn(attr, obj[attr]);
}
}
}
//模拟java的map
var map = new Map();
map.put('01','abc');
map.put('02',0);
map.put('03',false);
map.put('04',new Date());
//alert(map.size());
//alert(map.get('03'));
//map.remove('03');
//alert(map.get('03'));
map.eachMap(function(key,value){
alert(key+":" + value);
});
</script>
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