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<?php $array = ["a","b","c","d","e"]; var_export(array_map(null, $array, array_slice($array, 1)));
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => array ( 0 => 'a', 1 => 'b', ), 1 => array ( 0 => 'b', 1 => 'c', ), 2 => array ( 0 => 'c', 1 => 'd', ), 3 => array ( 0 => 'd', 1 => 'e', ), 4 => array ( 0 => 'e', 1 => NULL, ), )

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