JS删除数组

删除数组

方法一

/*

* 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);

</script>

方法二

/*

* 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.

* splice方法见http://www.w3school.com.cn/js/jsref_slice_array.asp

*/

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);

</script>