JS中的Map

源：http://blog.sina.com.cn/s/blog_7e9c5b6801016oyz.html
评：
/**
* json convert to map
* @param str
* @param map
*/
function json2Map(str, map) {
var obj = eval('(' + str + ')');

for(var k in obj) {
if(typeof(obj[k])=='function') {
continue;
} else {
map.put(k, obj[k]);
}
}
}

/**
* design js map
*/
var map = new Map();
map.put("a", "aaa");
map.put("b","bbb");
map.put("cc","cccc");
map.put("c","ccc");
map.remove("cc");
var array = map.keySet();
for(var i in array) {
document.write("key:(" + array[i] +") <br>value: ("+map.get(array[i])+") <br>");
}



function Map(){
this.container = new Object();
}


Map.prototype.put = function(key, value){
this.container[key] = value;
}


Map.prototype.get = function(key){
return this.container[key];
}


Map.prototype.keySet = function() {
var keyset = new Array();
var count = 0;
for (var key in this.container) {
// 跳过object的extend函数
if (key == 'extend') {
continue;
}
keyset[count] = key;
count++;
}
return keyset;
}


Map.prototype.size = function() {
var count = 0;
for (var key in this.container) {
// 跳过object的extend函数
if (key == 'extend'){
continue;
}
count++;
}
return count;
}


Map.prototype.remove = function(key) {
delete this.container[key];
}


Map.prototype.toString = function(){
var str = "";
for (var i = 0, keys = this.keySet(), len = keys.length; i < len; i++) {
str = str + keys[i] + "=" + this.container[keys[i]] + ";\n";
}
return str;
}