JavaScript丨數組元素反轉

 

方法1：reverse方法

var arr1 = ['a', 'b', 'c', 'd', 'e']
console.log('source arr1 =', arr1)
arr1.reverse()
console.log('target arr1 =', arr1)

 

 

方式2：元素交換位置

var arr = [1, 2, 3, 4, 5, 6]
console.log('source arr =', arr)
for (var i = 0; i < arr.length / 2; i++) {
    var temp = arr[i]
    arr[i] = arr[arr.length - 1 - i]
    arr[arr.length - 1 - i] = temp
}
console.log('target arr =', arr)

 

 

 

參考：

https://github.com/wangjianuo/blog/issues/1