map-js

function Map() { this.elements = new Array(); //獲取MAP元素個數 this.size = function() { return this.elements.length; }; //判斷MAP是否爲空 this.isEmpty = function() { return (this.elements.length < 1); }; //刪除MAP全部元素 this.clear = function() { this.elements = new Array(); }; //向MAP中增長元素（key, value) this.put = function(_key, _value) { this.elements.push( { key : _key, value : _value }); }; //刪除指定KEY的元素，成功返回True，失敗返回False this.remove = function(_key) { var bln = false; try { for (i = 0; i < this.elements.length; i++) { if (this.elements[i].key == _key) { this.elements.splice(i, 1); return true; } } } catch (e) { bln = false; } return bln; }; //獲取指定KEY的元素值VALUE，失敗返回NULL this.get = function(_key) { try { for (i = 0; i < this.elements.length; i++) { if (this.elements[i].key == _key) { return this.elements[i].value; } } } catch (e) { return null; } }; //獲取指定索引的元素（使用element.key，element.value獲取KEY和VALUE），失敗返回NULL this.element = function(_index) { if (_index < 0 || _index >= this.elements.length) { return null; } return this.elements[_index]; }; //判斷MAP中是否含有指定KEY的元素 this.containsKey = function(_key) { var bln = false; try { for (i = 0; i < this.elements.length; i++) { if (this.elements[i].key == _key) { bln = true; } } } catch (e) { bln = false; } return bln; }; //判斷MAP中是否含有指定VALUE的元素 this.containsValue = function(_value) { var bln = false; try { for (i = 0; i < this.elements.length; i++) { if (this.elements[i].value == _value) { bln = true; } } } catch (e) { bln = false; } return bln; }; //獲取MAP中全部VALUE的數組（ARRAY） this.values = function() { var arr = new Array(); for (i = 0; i < this.elements.length; i++) { arr.push(this.elements[i].value); } return arr; }; //獲取MAP中全部KEY的數組（ARRAY） this.keys = function() { var arr = new Array(); for (i = 0; i < this.elements.length; i++) { arr.push(this.elements[i].key); } return arr; }; } js中使用時，var newObj = new Map();