ALGORITHM

TIL 2021.05.07

Solved in: Javascript and Python

QUESTION

58. Length of Last Word

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 ‘ ‘.

Solution: JavaScript

/**
 * @param {string} s
 * @return {number}
 */
var lengthOfLastWord = function(s) {
    const arr = s.split(" ")
    let words = []
    for(let i = 0; i < arr.length; i++){
        if(arr[i] !== ""){
            words.push(arr[i])
        }
    }
    
    if(words.length > 1){
        return words[words.length-1].length
    } else if (words.length === 1){
        return words[0].length
    } else {
        return 0
    }
};

Solution: Python

class Solution(object):
    def lengthOfLastWord(self, s):
        """
        :type s: str
        :rtype: int
        """
        words = s.split()
        if len(words) >= 1:
            return len(words[len(words) - 1])
        else:
            return 0