[leetcode] length of the last word [58]

problem :  Give you a string s, It consists of several words , Words are separated by some space characters . Returns the length of the last word in a string ( A word is made up of only letters 、 The largest substring that does not contain any space characters )

Example 1

Input : s = "Hello World"
Output : 5
explain : The last word is “World”, The length is 5

Example 2

Input : s = "   fly me   to   the moon  "
Output : 4
explain : The last word is “moon”, The length is 4 

Example 3

Input : s = "luffy is still joyboy"
Output : 6
explain : The last word is... In length 6 Of “joyboy” 

#  solution 1
def lengthOfLastWord(s):
    #  Remove spaces at both ends of the string 
    s = s.strip(" ")
    arr = s.split(" ")
    lastWord = arr[-1]
    res = len(lastWord)
    return res

#  solution 2
def lengthOfLastWord(s):
    res = []
    new_s = s.strip()
    new_s = new_s[::-1]
    for i in new_s:
        if i != ' ':
            res.append(i)
        else:
            break
    return len(res)

lengthOfLastWord("Hello World") # 5
lengthOfLastWord("   fly me   to   the moon  ") # 4
lengthOfLastWord("luffy is still joyboy") # 6