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<?php $x = array(0 => 3, 3 => 1, 1 => 'dupa'); var_dump(array_map(function($x) { return (bool) $x;}, $x));
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> bool(true) [3]=> bool(true) [1]=> bool(true) }

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