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<?php function holy_grail_countdown($number) { while (0 <= $number) { $reset = (yield $number); $number = $reset ?: $number - 1; } } $c = holy_grail_countdown(5); foreach ($c as $number) { echo "$number\n"; if (5 === $number) { $c->send(3); } }
Output for git.master, git.master_jit, rfc.property-hooks
5 2 1 0

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