JavaScript：對象複製

javascript裡面對象的等號賦值操作是引用方式，如果想要使用拷貝賦值操作需要實現像java中clone一樣的功能，實現方法就是逐項拷貝對象的內容。實現如下：

方法一：

function clone(myObj){    if(typeof(myObj) != 'object') return myObj;    if(myObj == null) return myObj;        var myNewObj = new Object();        for(var i in myObj)       myNewObj[i] = clone(myObj[i]);        return myNewObj;  }  

方法二：通過object原型擴充實現

Object.prototype.Clone = function()  {      var objClone;      if ( this.constructor == Object ) objClone = new this.constructor();      else objClone = new this.constructor(this.valueOf());      for ( var key in this )       {          if ( objClone[key] != this[key] )           {              if ( typeof(this[key]) == 'object' )               {                   objClone[key] = this[key].Clone();               }              else               {                   objClone[key] = this[key];               }           }       }       objClone.toString = this.toString;       objClone.valueOf = this.valueOf;      return objClone;  }