LastWord.js

// Given a string s consists of some words separated by spaces, return the length of the last word in the string. If the last word does not exist, return 0.

// A word is a maximal substring consisting of non-space characters only.

// Example 1:
// Input: s = "Hello World"
// Output: 5

// Example 2:
// Input: s = " "
// Output: 0

// Constraints:
// 1 <= s.length <= 104
// s consists of only English letters and spaces ' '.
const lengthOfLastWord = function (s) {
  let lastWord = s.trim().split(" ");
  return lastWord[lastWord.length - 1].length;
};

// second solution
const lengthOfLastWord = (s) => s.trim().split(" ").pop().length;