length-of-last-word.js

// 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) {
    s = s.trim();
    var arr = s.split(' ');
    return arr[arr.length - 1].length;
};