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<?php $ids=array(array("a","s"),array("b","s"), array("c","s"), array("e","s")); $groups=array(array("b","s"),array("c","s")); array_walk($groups,function($v,$i)use(&$ids){ $ids=array_diff ($ids,$v); }); print_r($ids);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Array to string conversion in /in/BcbTq on line 6 Warning: Array to string conversion in /in/BcbTq on line 6 Warning: Array to string conversion in /in/BcbTq on line 6 Warning: Array to string conversion in /in/BcbTq on line 6 Warning: Array to string conversion in /in/BcbTq on line 6 Warning: Array to string conversion in /in/BcbTq on line 6 Warning: Array to string conversion in /in/BcbTq on line 6 Warning: Array to string conversion in /in/BcbTq on line 6 Array ( [0] => Array ( [0] => a [1] => s ) [1] => Array ( [0] => b [1] => s ) [2] => Array ( [0] => c [1] => s ) [3] => Array ( [0] => e [1] => s ) )

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