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：元素交换位置

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)

 

 

 

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