js中array(数组)对象的splice方法的详解

splice()可向数组删除并加入新的元素。

语法

arrayObject.splice(index,howmany,element1,.....,elementX)

<script type="text/javascript">

var arr = new Array(5)

arr[0] = "Jani"

arr[1] = "Hege"

arr[2] = "Stale"

arr[3] = "Kai Jim"

arr[4] = "Borge"

document.write(arr + "<br />")

arr.splice(2,0,"Lene")

document.write(arr + "<br />")

</script>

输出结果为：

Jani,Hege,Stale,Kai Jim,Borge

Jani,Hege,Lene,Stale,Kai Jim,Borge

arr.splice(2,1,"Tove")

输出结果为：

Jani,Hege,Stale,Kai Jim,Borge

Jani,Hege,Tove,Kai Jim,Borge

arr.splice(2,3,"Tove")

输出结果为：

Jani,Hege,Stale,Kai Jim,Borge

Jani,Hege,Tove