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<?php function gen_map($f, $iter) { foreach ($iter as $k => $v) { yield $k => $f($v); } } // example: function times_two($x) { return $x * 2; } $source = new ArrayIterator([0, 1, 2, 3, 4, 5, 6]); //var_dump(iterator_to_array(iter_map('times_two', $source))); var_dump(iterator_to_array(gen_map('times_two', $source)));
Output for git.master, git.master_jit, rfc.property-hooks
array(7) { [0]=> int(0) [1]=> int(2) [2]=> int(4) [3]=> int(6) [4]=> int(8) [5]=> int(10) [6]=> int(12) }

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