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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 key and value and should return a * modified value. * * The key is left as-is. * * Examples: * * Dict\map_with_key([1, 2, 3, 4, 5], fn($k, $v) => $k + $v); * => Dict(1, 3, 5, 7, 9) * * @template Tk of array-key * @template Tv * @template T * * @param iterable<Tk, Tv> $iterable Iterable to be mapped over * @param (Closure(Tk,Tv): T) $function * * @return ($iterable is non-empty-array ? non-empty-array<Tk, T> : array<Tk, T>) */ function map_with_key(iterable $iterable, Closure $function): array { $result = []; foreach ($iterable as $key => $value) { $result[$key] = $function($key, $value); } return $result; }
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