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<?php declare(strict_types=1); namespace Psl\Dict; /** * Returns a new dict formed by merging the iterable elements of the * given iterable. * * In the case of duplicate keys, later values will overwrite * the previous ones. * * Example: * Dict\flatten([[1, 2], [9, 8]]) * => Dict(0 => 9, 1 => 8) * * Dict\flatten([[0 => 1, 1 => 2], [2 => 9, 3 => 8]]) * => Dict(0 => 1, 1 => 2, 2 => 9, 3 => 8) * * @template Tk of array-key * @template Tv * * @param iterable<iterable<Tk, Tv>> $iterables * * @return array<Tk, Tv> */ function flatten(iterable $iterables): array { $result = []; foreach ($iterables as $iterable) { foreach ($iterable as $key => $value) { $result[$key] = $value; } } return $result; }