lengthOfLastWord.js

/*

Given a string s consisting of words and spaces, return the length of the last word in the string.

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

 

Example 1:

Input: s = "Hello World"
Output: 5
Explanation: The last word is "World" with length 5.
Example 2:

Input: s = "   fly me   to   the moon  "
Output: 4
Explanation: The last word is "moon" with length 4.
Example 3:

Input: s = "luffy is still joyboy"
Output: 6
Explanation: The last word is "joyboy" with length 6.

*/

function lengthOfLastWord(s) {
  // my first attempt - less performant due to the reduce
  // const arr: string[] = s.split(' ').reduce((ac, cur) => {
  //     if (cur && cur !== '') return [...ac, cur]

  //     return ac
  // }, [])

  // return arr[arr.length - 1].length

  // simple one line solution
  return s.trim().split(' ').pop().length;
}