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Diffstat (limited to 'src/client/elm/Utils/Maybe.elm')
| -rw-r--r-- | src/client/elm/Utils/Maybe.elm | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/src/client/elm/Utils/Maybe.elm b/src/client/elm/Utils/Maybe.elm index 4a94aa5..46456e1 100644 --- a/src/client/elm/Utils/Maybe.elm +++ b/src/client/elm/Utils/Maybe.elm @@ -1,7 +1,8 @@ module Utils.Maybe exposing ( isJust - , catMaybes - , maybeToList + , cat + , toList + , orElse ) isJust : Maybe a -> Bool @@ -10,8 +11,8 @@ isJust maybe = Just _ -> True Nothing -> False -catMaybes : List (Maybe a) -> List a -catMaybes = +cat : List (Maybe a) -> List a +cat = List.foldr (\mb xs -> case mb of @@ -20,8 +21,14 @@ catMaybes = ) [] -maybeToList : Maybe a -> List a -maybeToList mb = +toList : Maybe a -> List a +toList mb = case mb of Just a -> [a] Nothing -> [] + +orElse : Maybe a -> Maybe a -> Maybe a +orElse mb1 mb2 = + case mb1 of + Just x -> Just x + Nothing -> mb2 |