length-of-last-word
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.
Solution
length-of-last-word
/**
* @param {string} s
* @return {number}
*/
var lengthOfLastWord = function (s) {
// 排除尾巴的空白
let endIndex = s.length - 1;
while (s[endIndex] === " ") {
endIndex--;
}
let len = 0;
while (endIndex >= 0 && s[endIndex] !== " ") {
len++;
endIndex--;
}
return len;
};
length-of-last-word
/**
* @param {string} s
* @return {number}
*/
var lengthOfLastWord = function (s) {
let words = s.trim().split(" ");
return words[words.length - 1].length;
};