/**
* @inheritdoc
*/
public function bind(callable $transformation)
{
// xs >>= f = concat (map f xs)
return self::of(f\concat(f\map($transformation, $this)));
}
/**
* @dataProvider provideData
*/
public function test_it_should_concat_values_to_array($value, $expected)
{
$this->assertEquals($expected, f\concat($value));
}