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<?php function group($cond, $arr) { if (empty($arr)) return []; $e = array_shift($arr); $g = [$e]; while($cond($e, reset($arr))) { $g[] = array_shift($arr); } return array_merge([$g], group($cond, $arr)); } function it($m,$p){echo ($p?'OK':'NO')." It $m\n";} function eq($a,$b) {return $a==$b;} echo it ('groups', group('eq', [1,5,5,6,6,6,7,9]) == [[1],[5,5],[6,6,6],[7],[9]]); print_r(group(function ($a, $b) { return ($a == ($b-1)) || ($a==$b); }, [1, 1, 2, 3, 1]));
Output for git.master, git.master_jit, rfc.property-hooks
OK It groups Array ( [0] => Array ( [0] => 1 [1] => 1 [2] => 2 ) [1] => Array ( [0] => 3 ) [2] => Array ( [0] => 1 ) )

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