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<?php declare(strict_types=1); namespace Psl\Dict; use Closure; /** * Applies a mapping function to all values of an iterable. * * The function is passed the current iterable value and should return a * modified value. * * The key is left as-is and not passed to the mapping function. * * Examples: * * Dict\map([1, 2, 3, 4, 5], fn($i) => $i * 2); * => Dict(2, 4, 6, 8, 10) * * @template Tk of array-key * @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-array<Tk, T> : array<Tk, T>) */ function map(iterable $iterable, Closure $function): array { $result = []; foreach ($iterable as $key => $value) { $result[$key] = $function($value); } return $result; }