Reverse a string word by word

Problem

Given an input string, reverse the string word by word.
Example input: "The sky is blue"
Example output: "blue is sky The"

Solution

This solution is in JavaScript. Our A.I. can create solutions in multiple languages.

kayakane

// Solution:
// This solution is optimal because it uses a single loop to iterate through the string.
// It also uses a single array to store the words in reverse order.
// The solution is also very readable and easy to understand.

function reverseWords(str) {
  let words = [];
  let word = '';

  for (let i = 0; i < str.length; i++) {
    if (str[i] === ' ') {
      words.unshift(word);
      word = '';
    } else {
      word += str[i];
    }
  }

  words.unshift(word);

  return words.join(' ');
}

console.log(reverseWords('The sky is blue'));