A while ago, I signed up at https://www.codewars.com/ to practice both my PHP and JS skills. I decided to publish my results and to compare them with the best practice solution if found, thus, here we go.

Task:

• Given an array with at least three numbers.
• All numbers are equal except one.
• Find the unique number.

My solution:

<?php

function find_uniq(array $array): int {
  sort($array);
  if ( $array[0] === $array[1] ) rsort($array);
  return $array[0];
}

Best practice:

<?php

function find_uniq($a) {
  sort($a);
  return ($a[0] === $a[1]) ? end($a) : current($a);
}

Resources:

• sort
• rsort
• end
• current