JavaScript 字符串反转的多种实现方式与算法解析

let str = "i am good man";
let newStr = str.split('').reverse().join("");
console.log(newStr)

let str = "i am good man ";
let newStr = "";
for(let i = 0;i<str.length;i++){
    let s = str.charAt(str.length-i-1)
    newStr += s;
}
console.log(newStr)//nam doog ma i
//从尾部开始遍历字符串，然后逐个拼接字符，得到最终的结果。

let str ="i am good man";
let newStr = Array.prototype.slice.call(str);
console.log(newStr.reverse().join(""))//nam doog ma i

/**
 * @param {character[]} s
 * @return {void} Do not return anything, modify s in-place instead.
 */
 //数组方法实现
var reverseString = function(s) {
    return s.reverse();
};

//双指针方法实现
var reverseString = function(s) {
    let l = -1 
    let r = s.length
	while(++l < --r) [s[l], s[r]] = [s[r], s[l]];
    return s;
};