使用javaScript反转数组的一部分

Question

我在Javascript中有一个数组,如下所示:

var v = new Array("a","b","c","d","e","f"...);

我想反转它但保留前两个元素,所以它会变成:

"a","b",...."f","e","d","c"

我怎样才能做到这一点？

Answer 1

试试这种方式:

var v = new Array("a","b","c","d","e","f");
var newArr = v.splice(0,2).concat(v.reverse()); // get the first 2 out of the array
console.log(newArr);

• 拼接
• CONCAT
• 相反

Answer 2

v = [].concat( v.slice(0,2), v.slice(2).reverse());
//v --> ["a", "b", "f", "e", "d", "c"]