JavaScript Array splice() 方法

语法

array.splice(index, howmany, item1, ....., itemX)

实例

在位置 2，添加新项目，并删除 1 个项目：

var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.splice(2, 1, "Lemon", "Kiwi");

 在位置2，添加新项目

var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.splice(2, 0, "Lemon", "Kiwi");