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<?php $fibMemo = call_user_func(function () { $memo = array(0 => 0, 1 => 1); $fib = function ($n) use (&$memo, &$fib) { if (!isset($memo[$n])) { $memo[$n] = $fib($n - 1) + $fib($n - 2); } return $memo[$n]; }; return $fib; }); echo $fibMemo(10);
Output for git.master, git.master_jit, rfc.property-hooks
55

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