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<?php declare(strict_types=1); namespace Psl\Vec; use Closure; use function array_map; use function array_values; use function is_array; /** * Applies a mapping function to all values of an iterable. * * The function is passed the current iterable value and should return a * modified value. * * Examples: * * Vec\map([1, 2, 3, 4, 5], fn($i) => $i * 2); * => Vec(2, 4, 6, 8, 10) * * @template Tk * @template Tv * @template T * * @param iterable<Tk, Tv> $iterable Iterable to be mapped over * @param (Closure(Tv): T) $function * * @return ($iterable is non-empty-array ? non-empty-list<T> : list<T>) */ function map(iterable $iterable, Closure $function): array { if (is_array($iterable)) { return array_values(array_map( /** * @param Tv $v */ static fn($v) => $function($v), $iterable )); } $result = []; foreach ($iterable as $value) { $result[] = $function($value); } return $result; }
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