reverse()

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reverse() 方法将数组中元素的位置颠倒，并返回该数组。数组的第一个元素会变成最后一个，数组的最后一个元素变成第一个。该方法会改变原数组。

const array1 = ["one", "two", "three"];
console.log("array1:", array1);
// expected output: "array1:" Array ["one", "two", "three"]

const reversed = array1.reverse();
console.log("reversed:", reversed);
// expected output: "reversed:" Array ["three", "two", "one"]

// Careful: reverse is destructive -- it changes the original array.
console.log("array1:", array1);
// expected output: "array1:" Array ["three", "two", "one"]