151. Reverse Words in a String

Description

Given an input string s, reverse the order of the words.

A word is defined as a sequence of non-space characters. The words in s will be separated by at least one space.

Return a string of the words in reverse order concatenated by a single space.

Note that s may contain leading or trailing spaces or multiple spaces between two words. The returned string should only have a single space separating the words. Do not include any extra spaces.

Example 1:

  Input: s = "the sky is blue"
  Output: "blue is sky the"

Example 2:

  Input: s = "  hello world  "
  Output: "world hello"
  Explanation: Your reversed string should not contain leading or trailing spaces.

Example 3:

  Input: s = "a good   example"
  Output: "example good a"
  Explanation: You need to reduce multiple spaces between two words to a single space in the reversed string.

Constraints:

• 1 <= s.length <= 104
• s contains English letters (upper-case and lower-case), digits, and spaces ' '.
• There is at least one word in s.

My Solution

 
/**
 * @param {string} s
 * @return {string}
 */
var reverseWords = function(s) { 
    return s.trim().split(' ').filter(word => word.length > 0).reverse().join(' ');
};