/**
* Wrap the provided value inside a Functor.
*
* @param array|ArrayObject|Traversable|FunctorInterface $input
*
* @return ArrayList|TraversableLeftFoldable
* @throws CoreException
*/
public static function toFunctor($input)
{
Arguments::define(Boa::leftFoldable())->check($input);
if ($input instanceof FunctorInterface) {
return $input;
}
if (is_array($input) || $input instanceof ArrayObject) {
return static::toList($input);
}
throw new CoreException('Unable to build Functor');
}
/**
* 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);
}
