分类:
javascript(84)
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- /*
- * 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False
- this.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False
- this.removeByValue = function(_value) {//removeByValueAndKey
- var 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False
- this.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 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NULL
- this.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value
- this.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;
- };
- }
时间: 2024-10-24 06:01:17