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|
module Utils.Maybe exposing
( isJust
, catMaybes
, maybeToList
)
isJust : Maybe a -> Bool
isJust maybe =
case maybe of
Just _ -> True
Nothing -> False
catMaybes : List (Maybe a) -> List a
catMaybes =
List.foldr
(\mb xs ->
case mb of
Just x -> x :: xs
Nothing -> xs
)
[]
maybeToList : Maybe a -> List a
maybeToList mb =
case mb of
Just a -> [a]
Nothing -> []
|
