手动翻转js

function reverseString(str) {
    return str.split('').reverse().join('');
}

console.log(reverseString("hello")); // 输出: "olleh"

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

function reverseStringEfficient(str) {
    let left = 0;
    let right = str.length - 1;
    let arr = str.split('');
    while (left < right) {
        [arr[left], arr[right]] = [arr[right], arr[left]];
        left++;
        right--;
    }
    return arr.join('');
}

function reverseStringImmutable(str) {
    return [...str].reverse().join('');
}