151. Reverse Words in a String

Difficulty:
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Problem

Given an input string, reverse the string word by word.

Example:  

Input: "the sky is blue",
Output: "blue is sky the".

Note:

Follow up: For C programmers, try to solve it in-place in O(1) space.

Solution

/**
 * @param {string} str
 * @returns {string}
 */
var reverseWords = function(str) {
  return str.split(' ').filter(s => s !== '').reverse().join(' ');
};

Explain:

nope.

Complexity: