本文實例講述了JS模擬的Map類。分享給大家供大家參考，具體如下：
根據java中map的屬性，實現key----value保存
1、使用數組方式存儲數據，（使用閉包）
function Map() { var struct = function (key, value) { this.key = key; this.value = value; } var put = function (key, value) { for (var i = 0; i < this.arr.length; i++) { if (this.arr[i].key === key) { this.arr[i].value = value; return; } } this.arr[this.arr.length] = new struct(key, value); } var get = function (key) { for (var i = 0; i < this.arr.length; i++) { if (this.arr[i].key === key) { return this.arr[i].value; } } return null; } var remove = function (key) { var v; for (var i = 0; i < this.arr.length; i++) { v = this.arr.pop(); if (v.key === key) { continue; } this.arr.unshift(v); } } var size = function () { return this.arr.length; } var isEmpty = function () { return this.arr.length <= 0; } this.arr = new Array(); this.get = get; this.put = put; this.remove = remove; this.size = size; this.isEmpty = isEmpty;}2、使用JSON方式存儲數據（使用原型方式拓展方法）
function Map() { this.obj = {}; this.count = 0;}Map.prototype.put = function (key, value) { var oldValue = this.obj[key]; if (oldValue == undefined) { this.count++; } this.obj[key] = value;}Map.prototype.get = function (key) { return this.obj[key];}Map.prototype.remove = function (key) { var oldValue = this.obj[key]; if (oldValue != undefined) { this.count--; delete this.obj[key]; }}Map.prototype.size = function () { return this.count;}var map = new Map();map.put("key","map");map.put("key","map1");alert(map.get("key"));//map1map.remove("key");alert(map.get("key"));//undefined更多關於JavaScript相關內容感興趣的讀者可查看本站專題：《JavaScript切換特效與技巧總結》、《JavaScript查找算法技巧總結》、《JavaScript動畫特效與技巧匯總》、《JavaScript錯誤與調試技巧總結》、《JavaScript數據結構與算法技巧總結》、《JavaScript遍曆算法與技巧總結》及《JavaScript數學運算用法總結》
希望本文所述對大家JavaScript程序設計有所幫助。