一天一大 lee(反转字符串中的单词 III)难度:简单-Day20200830

输入："Let's take LeetCode contest"
输出："s'teL ekat edoCteeL tsetnoc"

/**
 * @param {string} s
 * @return {string}
 */
var reverseWords = function (s) {
  // 翻转字符串
  function reverseStr(str) {
    let result = '',
      n = str.length,
      i = 0
    while (i < n) {
      result = str[i] + result
      i++
    }
    return result
  }

  let _result = '',
    len = s.length

  if (len === 0) return _result

  let words = s.split(' '),
    wordsLen = words.length

  // 分割字符逐个翻转
  for (let i = 0; i < wordsLen; i++) {
    _result = _result + ' ' + reverseStr(words[i])
  }

  return _result.trim()
}

/**
 * @param {string} s
 * @return {string}
 */
var reverseWords = function (s) {
  return s
    .split(' ')
    .map((item) => Array.from(item).reverse().join(''))
    .join(' ')
}