原生js实现reverse

function reverseArray(arr) {
    let newArr = [];
    for (let i = arr.length - 1; i >= 0; i--) {
        newArr.push(arr[i]);
    }
    return newArr;
}

let originalArray = [1, 2, 3, 4, 5];
let reversedArray = reverseArray(originalArray);
console.log(reversedArray); // 输出: [5, 4, 3, 2, 1]

function reverseInPlace(arr) {
    let start = 0;
    let end = arr.length - 1;
    while (start < end) {
        // 交换元素
        let temp = arr[start];
        arr[start] = arr[end];
        arr[end] = temp;
        start++;
        end--;
    }
    return arr;
}

let originalArray = [1, 2, 3, 4, 5];
reverseInPlace(originalArray);
console.log(originalArray); // 输出: [5, 4, 3, 2, 1]