在JavaScript中实现自己的Map对象

一、Map源代码

/** Map is a general map object for storing key value pairs

* @param m - default set of properties

*/

var Map =function(m) {

var map;

if (typeof m == 'undefined') map = new Array();

else map = m;

/**

* Get a list of the keys to check

*/

this.keys = function() {

var _keys = new Array();

for (var _i in map){

_keys.push(_i);

}

return _keys;//

};

/**

* Put stores the value in the table

* @param key the index in the table where the value will be stored

* @param value the value to be stored

*/

this.put = function(key,value) {

map[key] = value;

};

/**

* Return the value stored in the table

* @param key the index of the value to retrieve

*/

this.get = function(key) {

return map[key];

};

/**

* Remove the value from the table

* @param key the index of the value to be removed

*/

this.remove = function(key) {

map[key]=null;

delete map[key];

};

/**

* Clear the table

*/

this.clear = function() {

delete map;

map = new Array();

};

}

二、创建Map对象

var m=new Map();

m.put("id","1000");

m.put("name","张三");

三、运用 www.2cto.com

<div id="testMap"'></div>

<script type='text/javascript'>

document.getElementById("testMap").innerHTML=m.get("name");

</script>