/** MAP对象，实现MAP功能** 接口：* size()     获取MAP元素个数* isEmpty()    判断MAP是否为空* clear()     删除MAP所有元素* put(key, value)   向MAP中增加元素（key, value) * remove(key)    删除指定KEY的元素，成功返回True，失败返回False* get(key)    获取指定KEY的元素值VALUE，失败返回NULL* element(index)   获取指定索引的元素（使用element.key，element.value获取KEY和VALUE），失败返回NULL* containsKey(key)  判断MAP中是否含有指定KEY的元素* containsValue(value) 判断MAP中是否含有指定VALUE的元素* values()    获取MAP中所有VALUE的数组（ARRAY）* keys()     获取MAP中所有KEY的数组（ARRAY）** 例子：* var map = new Map();** map.put("key", "value");* var val = map.get("key")* ……**/function Map() {this.elements = new Array();//获取MAP元素个数this.size = function() {return this.elements.length;};//判断MAP是否为空this.isEmpty = function() {return (this.elements.length < 1);};//删除MAP所有元素this.clear = function() {this.elements = new Array();};//向MAP中增加元素（key, value) this.put = function(_key, _value) {this.elements.push( {key : _key,value : _value});};//删除指定KEY的元素，成功返回True，失败返回Falsethis.removeByKey = 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;};//删除指定VALUE的元素，成功返回True，失败返回Falsethis.removeByValue = function(_value) {//removeByValueAndKeyvar bln = false;try {for (i = 0; i < this.elements.length; i++) {if (this.elements[i].value == _value) {this.elements.splice(i, 1);return true;}}} catch (e) {bln = false;}return bln;};//删除指定VALUE的元素，成功返回True，失败返回Falsethis.removeByValueAndKey = function(_key,_value) {var bln = false;try {for (i = 0; i < this.elements.length; i++) {if (this.elements[i].value == _value && this.elements[i].key == _key) {this.elements.splice(i, 1);return true;}}} catch (e) {bln = false;}return bln;};//获取指定KEY的元素值VALUE，失败返回NULLthis.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 false;}return false;};//获取指定索引的元素（使用element.key，element.value获取KEY和VALUE），失败返回NULLthis.element = function(_index) {if (_index < 0 || _index >= this.elements.length) {return null;}return this.elements[_index];};//判断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;};//判断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;};//判断MAP中是否含有指定VALUE的元素this.containsObj = function(_key,_value) {var bln = false;try {for (i = 0; i < this.elements.length; i++) {if (this.elements[i].value == _value && this.elements[i].key == _key) {bln = true;}}} catch (e) {bln = false;}return bln;};//获取MAP中所有VALUE的数组（ARRAY）this.values = function() {var arr = new Array();for (i = 0; i < this.elements.length; i++) {arr.push(this.elements[i].value);}return arr;};//获取MAP中所有VALUE的数组（ARRAY）this.valuesByKey = function(_key) {var arr = new Array();for (i = 0; i < this.elements.length; i++) {if (this.elements[i].key == _key) {arr.push(this.elements[i].value);}}return arr;};//获取MAP中所有KEY的数组（ARRAY）this.keys = function() {var arr = new Array();for (i = 0; i < this.elements.length; i++) {arr.push(this.elements[i].key);}return arr;};//获取key通过valuethis.keysByValue = function(_value) {var arr = new Array();for (i = 0; i < this.elements.length; i++) {if(_value == this.elements[i].value){arr.push(this.elements[i].key);}}return arr;};//获取MAP中所有KEY的数组（ARRAY）this.keysRemoveDuplicate = function() {var arr = new Array();for (i = 0; i < this.elements.length; i++) {var flag = true;for(var j=0;j<arr.length;j++){if(arr[j] == this.elements[i].key){flag = false;break;} }if(flag){arr.push(this.elements[i].key);}}return arr;};}