/**
* @dataProvider dataGroupProvider
*
* @param $callback
* @param $array
* @param $expect
*/
public function testGroup($callback, $array, $expect)
{
$actual = Arrays::group($array, $callback);
$this->assertEquals($expect, $actual);
$this->assertEquals(json_encode($expect), json_encode($actual));
}
/**
* @param callable $callback
* @return Map
*/
public function group(callable $callback)
{
$items = $this->toArray();
return new ArrayMap(Arrays::group($items, $callback));
}
