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  1. fromMaybe :: (OperatorContext c, HasColumnConstraint NotNull r) => Record c r -> Record c (Maybe r) -> Record c r

    relational-schemas Database.Custom.IBMDB2

    Operator from maybe type using record extended isNull.

  2. fromMaybe :: (OperatorContext c, HasColumnConstraint NotNull r) => Record c r -> Record c (Maybe r) -> Record c r

    relational-schemas Database.Custom.MySQL

    Operator from maybe type using record extended isNull.

  3. fromMaybe :: (OperatorContext c, HasColumnConstraint NotNull r) => Record c r -> Record c (Maybe r) -> Record c r

    relational-schemas Database.Custom.Oracle

    Operator from maybe type using record extended isNull.

  4. fromMaybe :: (OperatorContext c, HasColumnConstraint NotNull r) => Record c r -> Record c (Maybe r) -> Record c r

    relational-schemas Database.Custom.PostgreSQL

    Operator from maybe type using record extended isNull.

  5. fromMaybe :: (OperatorContext c, HasColumnConstraint NotNull r) => Record c r -> Record c (Maybe r) -> Record c r

    relational-schemas Database.Custom.SQLServer

    Operator from maybe type using record extended isNull.

  6. fromMaybe :: (OperatorContext c, HasColumnConstraint NotNull r) => Record c r -> Record c (Maybe r) -> Record c r

    relational-schemas Database.Custom.SQLite3

    Operator from maybe type using record extended isNull.

  7. fromMaybe :: a -> Maybe a -> a

    verset Verset

    The fromMaybe function takes a default value and a Maybe value. If the Maybe is Nothing, it returns the default value; otherwise, it returns the value contained in the Maybe.

    Examples

    Basic usage: 
    >>> fromMaybe "" (Just "Hello, World!")
"Hello, World!"

    >>> fromMaybe "" Nothing
""
    Read an integer from a string using readMaybe. If we fail to parse an integer, we want to return 0 by default: 
    >>> import GHC.Internal.Text.Read ( readMaybe )

>>> fromMaybe 0 (readMaybe "5")
5

>>> fromMaybe 0 (readMaybe "")
0

  8. newtype FromMaybe b

    foldl Control.Foldl.NonEmpty 

    instance Monad m => Semigroup (FromMaybe m a) where
mappend (FromMaybe f) (FromMaybe g) = FromMaybeM (f . Just . g)

  9. FromMaybe :: (Maybe b -> b) -> FromMaybe b

    foldl Control.Foldl.NonEmpty

    No documentation available.

  10. data FromMaybe (a :: k) (b :: Maybe k) (c :: k)

    first-class-families Fcf

    No documentation available.

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