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run code in 150+ php & hhvm versions
Bugs & Features
<?php function find_group($cond, &$arr, $e = null) { if ($cond($e, reset($arr) || $e === null)) { $e = array_shift($arr); return array_merge([$e], find_group($cond, $arr, $e)); } return []; } function array_group($cond, $arr) { if (empty($arr)) return []; /*while($cond($e, reset($arr))) { $g[] = array_shift($arr); }*/ return array_merge([find_group($arr, $cond)], array_group($cond, $arr)); } function it($m,$p){echo ($p?'OK':'NO')." It $m\n";} function eq($a,$b) {return $a==$b;} echo it ('groups', array_group('eq', [1,5,5,6,6,6,7,9]) == [[1],[5,5],[6,6,6],[7],[9]]); echo it ('groups by comparing with first item of each group', array_group(function ($a, $b) { return ($a == ($b-1)) || ($a==$b); }, [1,1,2,3,1]) == [[1,1,2],[3],[1]]); echo it ('groups by comparing with first item of each group', array_group(function ($a, $b) { return ($a == ($b-1)) || ($a==$b); }, [1,1,2,1,3,1]) == [[1,1,2,1],[3],[1]]);
based on 2evU7
Output for 7.0.0 - 7.1.0
Fatal error: Uncaught Error: Function name must be a string in /in/sTUsn:5 Stack trace: #0 /in/sTUsn(23): find_group(Array, 'eq') #1 /in/sTUsn(30): array_group('eq', Array) #2 {main} thrown in /in/sTUsn on line 5
Process exited with code 255.
Output for hhvm-3.10.0 - 3.12.0
Fatal error: Invalid callable (array) in /in/sTUsn on line 5
Process exited with code 255.
Output for 5.4.0 - 5.6.28
Fatal error: Function name must be a string in /in/sTUsn on line 5
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/sTUsn on line 8
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/sTUsn on line 8
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/sTUsn on line 8
Process exited with code 255.