Split an array into [matches, non-matches] using a predicate callback. Single pass, preserves order, returns two lists.
PHP
<?php
function partition(array $items, callable $predicate): array {
$pass = $fail = [];
foreach ($items as $item) {
if ($predicate($item)) $pass[] = $item;
else $fail[] = $item;
}
return [$pass, $fail];
}
[$evens, $odds] = partition([1,2,3,4,5,6], fn($n) => $n % 2 === 0);
print_r($evens); // [2, 4, 6]
print_r($odds); // [1, 3, 5]Save your own code snippets
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