javascript - 反转字符串中单词的字符顺序

Question

Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.

Example 1: Input: "Let's take LeetCode contest" Output: "s'teL ekat edoCteeL tsetnoc"

现在我已经为其编写了以下代码，但它输出，

Output: "s'teL ekat edoCteeL setnoc"

而不是，

Output: "s'teL ekat edoCteeL tsetnoc"

我错过了什么？

/**
 * @param {string} s
 * @return {string}
 */
var reverseWords = function(s) {
    var result="";
    var new_word= 0;
    for (var i=0; i< s.length; i++)
    {
        if ((s[i] ==" ") || s[i+1] == undefined)
        {
            result=result+" "+ s.slice(new_word, i).split("").reverse().join("");;
            new_word=i+1;
        }
    }
    return result;
};

Answer 1

使用Array#map的更简洁的解决方案:

var str = "Let's take LeetCode contest";

var output = str.split(" ").map(function(word) {
  return word.split('').reverse().join('');
}).join(" ");

console.log(output);