javascript類比map

標籤：javascript

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><script type="text/javascript" charset="UTF-8">function Map(){var obj = {};this.put = function(key , value){  obj[key] = value;}//size()擷取map的長度this.size = function(){  var count = 0;  for(var attr in obj){  count++;  }  return count;}//get()  由鍵取值this.get = function(key){if(obj[key] || obj[key]===0 || obj[key] === false){return obj[key];}else{return null;}}//remove()  :移除相應的索引值對this.remove = function(key){if(obj[key] || obj[key]===0 || obj[key] === false){var val = obj[key] ;delete obj[key];return val;}}//eachMap() : 遍曆mapthis.eachMap = function(){for(var attr in obj)console.log(attr+" : "+obj[attr])}}var m = new Map();m.put('01','a');m.put('02',true);m.put('03',new Date());console.log(m.size());//3console.log(m.get('01'));m.eachMap() ;console.log(m.remove('02'));m.eachMap();</script></head><body></body></html>

javascript類比map