数据结构76-集合常见操作代码-CFANZ编程社区

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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>集合封装</title>
</head>
<body>
    <script>
        function Set(){
            this.items={}
            Set.prototype.add=function(value){
                if(this.has(value)){
                    return false
                }
                //判断集合中是否又这个元素
                this.items[value]=value
                return true
            }

            Set.prototype.has=function(value){
                this.items.hasOwnProperty(value)
            }

            Set.prototype.remove=function(value){
                if(!this.has(value)){
                    return false
                }
                delete this.items[value]
                return true
            }

            Set.prototype.clear=function(){
               this.items={}
            }
            Set.prototype.size=function(){
               return Object.keys(this.items).length
            }
            Set.prototype.values=function(){
               return Object.keys(this.items)
            }
        }
    </script>
</body>
</html>