/**
* @dataProvider provideData
*/
public function test_it_should_extract_elements_which_exists($data)
{
// $get :: String a -> [b] -> Maybe b
$get = f\curryN(2, function ($key, $array) {
return isset($array[$key]) ? m\just($array[$key]) : m\nothing();
});
$listOfFirstImages = f\pipeline(Listt::of, f\map(m\maybeNull), f\bind(f\bind($get('meta'))), f\bind(f\bind($get('images'))), f\bind(f\bind($get(0))), f\join);
$result = $listOfFirstImages($data);
$this->assertEquals(Listt::of([m\just('//first.jpg'), m\just('//third.jpg'), m\nothing()]), $result);
}
public function test_it_should_retun_function_accepting_arguments()
{
$this->assertInstanceOf(\Closure::class, f\pipeline('strtolower', 'strtoupper'));
}
function handleRequest(array $request)
{
return call_user_func(f\pipeline('validateInput', f\map('canonizeEmail'), f\bind('updateDatabaseStep'), 'sendMessage'), $request);
}
