- function Map(){
- this.keys = new Array();
- this.data = new Object();
- var toString = Object.prototype.toString;
- /**
- * 当前Map当前长度
- */
- this.size = function(){
- return this.keys.length;
- }
- /**
- * 添加值
- * @param {Object} key
- * @param {Object} value
- */
- this.put = function(key, value){
- if(this.data[key] == null){
- this.data[key] = value;
- }
- this.keys.push(key);
- }
- /**
- * 根据当前key获取value
- * @param {Object} key
- */
- this.get = function(key){
- return this.data[key];
- }
- /**
- * 根据当前key移除Map对应值
- * @param {Object} key
- */
- this.remove = function(key){
- var index = this.indexOf(key);
- if(index != -1){
- this.keys.splice(index, 1);
- }
- this.data[key] = null;
- }
- /**
- * 清空Map
- */
- this.clear = function(){
- for(var i=0, len = this.size(); i < len; i++){
- var key = this.keys[i];
- this.data[key] = null;
- }
- this.keys.length = 0;
- }
- /**
- * 当前key是否存在
- * @param {Object} key
- */
- this.containsKey = function(key){
- return this.data[key] != null;
- }
- /**
- * 是否为空
- */
- this.isEmpty = function(){
- return this.keys.length === 0;
- }
- /**
- * 类型Java中Map.entrySet
- */
- this.entrySet = function(){
- var size = this.size();
- var datas = new Array(size);
- for (var i = 0, len = size; i < len; i++) {
- var key = this.keys[i];
- var value = this.data[key];
- datas[i] = {
- 'key' : key,
- 'value':value
- }
- }
- return datas;
- }
- /**
- * 遍历当前Map
- * var map = new Map();
- * map.put('key', 'value');
- * map.each(function(index, key, value){
- * console.log("index:" + index + "--key:" + key + "--value:" + value)
- * })
- * @param {Object} fn
- */
- this.each = function(fn){
- if(toString.call(fn) === '[object Function]'){
- for (var i = 0, len = this.size(); i < len; i++) {
- var key = this.keys[i];
- fn(i, key, this.data[key]);
- }
- }
- return null;
- }
- /**
- * 获取Map中 当前key 索引值
- * @param {Object} key
- */
- this.indexOf = function(key){
- var size = this.size();
- if(size > 0){
- for(var i=0, len=size; i < len; i++){
- if(this.keys[i] == key)
- return i;
- }
- }
- return -1;
- }
- /**
- * Override toString
- */
- this.toString = function(){
- var str = "{";
- for (var i = 0, len = this.size(); i < len; i++, str+=",") {
- var key = this.keys[i];
- var value = this.data[key];
- str += key + "=" + value;
- }
- str = str.substring(0, str.length-1);
- str += "}";
- return str;
- }
- /**
- * 获取Map中的所有value值(Array)
- */
- this.values = function(){
- var size = this.size();
- var values = new Array();
- for(var i = 0; i < size; i++){
- var key = this.keys[i];
- values.push(this.data[key]);
- }
- return values;
- }
- }
- //该片段来自于http://www.codesnippet.cn/detail/150720134580.html
来源: http://www.codesnippet.cn/detail/150720134580.html