java中创建一个map集合_js中创建Map集合

function Map() { //创建一个map集合

//这里定义数据结构

var struct = function(key, value) {

this.key = key;

this.value = value;

}

//这是添加的方法

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);

}

//获取的方法

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;

}

//这种是根据自己的需求来定义的方法

var getIndex = function(index){

if(this.arr.length-1>=index){

return this.arr[index].key;

}

return null;

}

//删除的方法

var remove = function(key) {

var v;

for (var i = 0; i < this.arr.length; i++) {

v = this.arr.pop();

if ( v.key*1 === key*1 ) {

continue;

}

this.arr.unshift(v);

}

}

//获取存储的数量

var size = function() {

return this.arr.length;

}

//判断是否为空

var isEmpty = function() {

return this.arr.length <= 0;

}

//清空

var toNull=function(){

this.arr=new Array();

}

//发布服务

this.arr = new Array();

this.get = get;

this.put = put;

this.toNull=toNull;

this.remove = remove;

this.getIndex =getIndex;

this.getValue=getValue;

this.size = size;

this.isEmpty = isEmpty;

}