<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" charset="UTF-8">
function Map(){
var obj = {};
this.put = function(key , value){
obj[key] = value;
}
//size()获取map的长度
this.size = function(){
var count = 0;
for(var attr in obj){
count++;
}
return count;
}
//get() 由键取值
this.get = function(key){
if(obj[key] || obj[key]===0 || obj[key] === false){
return obj[key];
}else{
return null;
}
}
//remove() :移除相应的键值对
this.remove = function(key){
if(obj[key] || obj[key]===0 || obj[key] === false){
var val = obj[key] ;
delete obj[key];
return val;
}
}
//eachMap() : 遍历map
this.eachMap = function(){
for(var attr in obj)
console.log(attr+" : "+obj[attr])
}
}
var m = new Map();
m.put('01','a');
m.put('02',true);
m.put('03',new Date());
console.log(m.size());//3
console.log(m.get('01'));
m.eachMap() ;
console.log(m.remove('02'));
m.eachMap();
</script>
</head>
<body>
</body>
</html>
时间： 2024-10-16 16:01:36