js删除Array数组中指定元素的两种方法

/* * 方法:Array.remove(dx) 通过遍历,重构数组 * 功能:删除数组元素. * 参数:dx删除元素的下标. */ Array.prototype.remove=function(dx) {   if(isNaN(dx)||dx>this.length){return false;}   for(var i=0,n=0;i<this.length;i++)   {     if(this[i]!=this[dx])     {       this[n++]=this[i]     }   }   this.length-=1 } a = ['1','2','3','4','5']; alert("elements: "+a+"/nLength: "+a.length); a.remove(1); //删除下标为1的元素 alert("elements: "+a+"/nLength: "+a.length);

/* * 方法:Array.baoremove(dx) * 功能:删除数组元素. * 参数:dx删除元素的下标. * 返回:在原数组上修改数组. */ Array.prototype.baoremove = function(dx) {   if(isNaN(dx)||dx>this.length){return false;}   this.splice(dx,1); } b = ['1','2','3','4','5']; alert("elements: "+b+"/nLength: "+b.length); b.baoremove(1); //删除下标为1的元素 alert("elements: "+b+"/nLength: "+b.length);