JavaScript之HashTable[转]

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
        <title>JSHashTable</title>
        <script type=text/javascript>
            function HashTable()
            {
                this.__hash = {};
                this.Add = function(key,value)
                {
                    if(typeof(key) != "undefined")
                    {
                        //if it not contains in hashtable 
                        if(! this.contains(key))
                        {
                            this.__hash[key] = typeof(value) == "undefined" ? null : value;
                            return true;
                        }
                        else{
                            return false;
                        }
                    }
                };    
                
                this.Remove = function(key){
                    delete this.__hash[key];
                };        
                this.count = function(){
                    var i = 0;
                    for(var obj in this.__hash)
                    {
                        i++;
                    }
                    return i;
                };    
                this.items = function(key){
                    return this.__hash[key];
                };
                this.contains = function(key){
                    return typeof(this.__hash[key]) != "undefined";
                };
                this.clear = function(){
                    for(var obj in this.__hash)
                    {
                        delete this.__hash[k];
                    }
                };
            }
            
            var obj = new HashTable();
            obj.Add("a");
            obj.Add("b","b");
            obj.Add("a");
            obj.Remove("a");
            alert(obj.contains("a"));
            obj.Add("c","I love you");
            alert(obj.items("c"));
        </script>
    </head>
    <body>
    </body>
</html>
posted @ 2008-07-06 18:58  Sam Lin  阅读(462)  评论(2)  编辑  收藏  举报