/**
* Run the flick on input.
*
* @param string|int $input
*
* @throws UnknownKeyException
* @return mixed
*/
public function go($input)
{
Arguments::define(Boa::readMap())->define($input);
$map = ComplexFactory::toReadMap($this->functions);
if ($map->member($input)) {
/** @var callable $function */
$function = Maybe::fromJust($map->lookup($input));
return $function();
} elseif ($map->member($this->default)) {
/** @var callable $function */
$function = Maybe::fromJust($map->lookup($this->default));
return $function();
}
throw new UnknownKeyException();
}
/**
* Returns a single item by iterating through the list, successively calling
* the iterator function and passing it an accumulator value and the current
* value from the array, and then passing the result to the next call.
* (From Ramda).
*
* @param callable $function
* @param mixed $initial
* @param array|Traversable $foldable
*
* @throws InvalidArgumentException
* @return mixed
*/
public static function foldl(callable $function, $initial, $foldable)
{
Arguments::define(Boa::func(), Boa::any(), Boa::leftFoldable())->check($function, $initial, $foldable);
return ComplexFactory::toLeftFoldable($foldable)->foldl($function, $initial);
}