Monomer.Helper

Helper functions used across the library. They do not belong to any specific module and are not directly exported.

Documentation

maybeConcat :: Monoid a => [a] -> Maybe a

Concats a list of Monoids or returns Nothing if empty.

collectJustM :: MonadIO m => m (Maybe a) -> m [a]

Runs an action until Nothing is returned, collecting the results in a list.

seqLast :: Seq a -> a

Returns the last item in a sequence. Unsafe, fails if sequence is empty.

seqStartsWith :: Eq a => Seq a -> Seq a -> Bool

Checks if the first sequence is a prefix of the second.

seqCatMaybes :: Seq (Maybe a) -> Seq a

Filters Nothing instances out of a Seq, and removes the Just wrapper.

applyFnList :: [a -> a] -> a -> a

Folds a list of functions over an initial value.

maxNumericValue :: RealFloat a => a

Returns the maximum value of a given floating type.

clamp :: Ord a => a -> a -> a -> a

Restricts a value to a given range.

catchAny :: IO a -> (SomeException -> IO a) -> IO a

Catches any exception thrown by the provided action

headMay :: [a] -> Maybe a

Returns Just the first item if the list is not empty, Nothing otherwise.