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<?php declare(strict_types=1); namespace Psl\Vec; /** * The same as chunk(), but preserving keys. * * Examples: * * Vec\chunk_with_keys(['a' => 1, 'b' => 2, 'c' => 3], 2) * => Iter(['a' => 1, 'b' => 2], ['c' => 3]) * * @template Tk * @template Tv * * @param iterable<Tk, Tv> $iterable The iterable to chunk * @param positive-int $size The size of each chunk * * @return list<array<Tk, Tv>> */ function chunk_with_keys(iterable $iterable, int $size): array { $result = []; $ii = 0; $chunk_number = -1; foreach ($iterable as $k => $value) { if ($ii % $size === 0) { $result[] = []; $chunk_number++; } $result[$chunk_number][$k] = $value; $ii++; } return values($result); }
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