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<?php
declare(strict_types=1);
namespace AHJ\ApprovalTests;
final class Combinations
{
public function getAllCombinations(array $arguments, array $currentCombination = []): array
$combinations = [];
$argumentsTail = $arguments;
$key = key($argumentsTail);
unset($argumentsTail[$key]);
if (0 === count($arguments)) {
return [$currentCombination];
}
foreach (current($arguments) as $element) {
$newCombination = $currentCombination;
array_push($newCombination, $element);
$combinations = $this->extend(
$this->getAllCombinations($argumentsTail, $newCombination),
$combinations
);
return $combinations;
private function extend(array $first, array $second): array
foreach ($second as $value) {
$first[] = $value;
return $first;
alexandrajulius /
approval-tests
