Cassidoo | Integer Odd/Even Sorting

README.md

Solution to Cassidoo's Week of Sept 11, 2023 Challenge

Given an array of integers, sort them into two separate sorted arrays of even and odd numbers. If you see a zero, skip it.

I just like recursion functions, okay??

Only supports positive integers at this time. Untested for negative (and ignores all non-positive, greater-than-zero, values)

separateAndSort.php

<?php

function separateAndSort($numbers = [], $result = [/* even */[], /* odd */[]]) {
	if (empty($numbers)) return $result;

	// Just for ease of reference.
	list($even, $odd) = $result;
	
	$current = array_pop($numbers);
	if ($current > 0) {
		if ($current % 2 == 0) {
			// Even
			array_push($even, $current);
		} else {
			array_push($odd, $current);
		}
	}

	sort($even);
	sort($odd);

	return separateAndSort($numbers, [$even, $odd]);
}

var_dump(separateAndSort([4,3,2,1,5,7,8,9]));
// [[2,4,6], [1,3,5,7,9]]

var_dump(separateAndSort([1,1,1,1]));
// [[], [1,1,1,1]]

// Ignore 0's
var_dump(separateAndSort([0,4,2,0,9]));
// [[2, 4], [9]]