在javascript中获取数组子索引的便捷方法

Question

有没有方便的方法来说明这个数组的前n个索引：

var alphabet = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'];

并将其存储在另一个数组中，比如说alphabet2 = ['a','b','c'];而不必用循环强力？感谢

Answer 1

使用the slice method：

> var alphabet = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'];
> alphabet.slice(0,3)
["a", "b", "c"]