58-easy-Length_of_Last_Word.js

/**
58. Length of Last Word

Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.

If the last word does not exist, return 0.

Note: A word is defined as a character sequence consists of non-space characters only.

For example,
Given s = "Hello World",
return 5.
 */

/**
* @param {string} s
* @return {number}
*/
var lengthOfLastWord = function (s) {
  return (s.split(' ').filter(item => item).pop() || '').length;
};