hashtable的javascript实现

  function HashTable() ...{ 
     var size = 0; 
     var entry = new Object(); 
     this.put = function (key, value) ...{ 
         entry[key] = value; 
         size++; 
     }; 

     this.putAll = function (htable) ...{ 
         if (typeof htable == "object" && !htable.sort) ...{ 
             for (var key in htable) ...{ 
                 this.put(key, htable[key]); 
             } 
         } else ...{ 
             throw "输入类型不正确，必须是HashTable类型！"; 
         } 
     }; 

     this.get = function (key) ...{ 
         return entry[key]; 
     }; 

     this.remove = function (key) ...{ 
         if (size == 0) 
             return; 
         delete entry[key]; 
         size--; 
     }; 

     this.containsKey = function (key) ...{ 
         if (entry[key]) ...{ 
             return true;
         } 
         return false;
     }; 

     this.containsValue = function (value) ...{ 
         for (var key in entry) ...{ 
             if (entry[key] == value) ...{ 
                 return true; 
            } 
         } 
         return false; 
     }; 

     this.clear = function () ...{ 
         entry = new Object(); 
         size = 0; 
     }; 

     this.isEmpty = function () ...{ 
         return size == 0; 
     }; 

     this.size = function () ...{ 
         return size; 
     }; 

     this.keySet = function () ...{ 
         var keys = new Array(); 
         for (var key in entry) ...{ 
             keys.push(key); 
         } 
         return keys; 
     }; 

     this.entrySet = function () ...{ 
         var entrys = new Array(); 
         for (var key in entry) ...{ 
             var et = new Object(); 
             et[key] = entry[key]; 
             entrys.push(et); 
         } 
         return entrys; 
     }; 

     this.values = function () ...{ 
         var values = new Array(); 
         for (var key in entry) ...{ 
             values.push(entry[key]); 
         } 
         return values; 
    }; 

     this.each = function (cb) ...{ 
         for (var key in entry) ...{ 
             cb.call(this, key, entry[key]); 
         } 
     }; 

     this.toString = function () ...{
         return obj2str(entry); 
     }; 

     function obj2str(o) ...{ 
         var r = []; 
         if (typeof o == "string")
             return "\\"" + o.replace(/([\\'\\"\\\\])/g, "\\\\$1").replace(/(\\n)/g, "\\\\n").replace(/(\\r)/g, "\\\\r").replace(/(\\t)/g, "\\\\t") + "\\""; 
         if (typeof o == "object") ...{ 
             for (var i in o) 
                 r.push("\\"" + i + "\\":" + obj2str(o[i])); 
             if (!!document.all && !/^\\n?function\\s*toString\\(\\)\\s*\\{\\n?\\s*\\[native code\\]\\n?\\s*\\}\\n?\\s*$/.test(o.toString)) ...{ 
                 r.push("toString:" + o.toString.toString()); 
             } 

             r = "{" + r.join() + "}"; 
             return r; 
         } 
         return o.toString(); 
     } 
 }

		

var ht = new HashTable();
ht.put("key","value");
ht.size();
ht.toString();
ht.values();
ht.entrySet()