Set package:relude

A set of values a.

Sets the given value to the structure using a setter.

A set of values. A set cannot contain duplicate values.

A set of integers.

Apply a function that returns a value inside of a functor, with the output in the first slot, the input in the second, and the entire tuple inside the functor. A dual to traverseToSnd

>>> traverseToFst (Just . (+1)) 10
Just (11,10)

>>> traverseToFst (const Nothing) 10
Nothing

Apply a function that returns a value inside of a functor, with the output in the second slot, the input in the first, and the entire tuple inside the functor. A dual to traverseToFst.

>>> traverseToSnd (Just . (+1)) 10
Just (10,11)

>>> traverseToSnd (const Nothing) 10
Nothing

Lifted version of hSetBuffering.