javascript模仿map
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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP ‘test3.jsp‘ starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> <script src="js/jquery-2.1.1.min.js"></script> <script> //模拟map function Map(){ var object={}; //空的对象，用于承载键值对 this.put=function(key,value){ object[key]=value; //把键值对绑定到object上 } this.size=function(){ var count=0; for(var attr in object){ count++; } return count; } this.get=function(key){ if(object[key]||object[key]===0||object[key]===false){ return object[key]; }else{ return null; } } this.remove=function(key){ if(object[key]||object[key]===0||object[key]===false){ delete object[key]; } } this.eachmap=function(fn){ for(var attr in object){ fn(attr,object[attr]); } } } var map=new Map(); map.put(‘1‘,‘1‘); map.put(‘2‘,‘2‘); map.put(‘3‘,‘3‘); alert(map.size()); alert(‘2‘); map.eachmap(function(key,value){ alert(key+":"+value); }); </script> </head> <body> This is my JSP page. <br> </body> </html>
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