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Within LTS Haskell 24.46 (ghc-9.10.3)

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  1. ByMaybeAttr :: WhyNullable

    persistent-mtl Database.Persist.Sql.Shim

    No documentation available.

  2. FieldAttrMaybe :: FieldAttr

    persistent-mtl Database.Persist.Sql.Shim

    The Maybe keyword goes after the type. This indicates that the column is nullable, and the generated Haskell code will have a Maybe type for it. Example:

    User
    name Text Maybe
    

  3. isFieldMaybe :: FieldDef -> Bool

    persistent-mtl Database.Persist.Sql.Shim

    Check if the field is `Maybe a`

  4. ByMaybeAttr :: WhyNullable

    persistent-redis Database.Persist.Redis

    No documentation available.

  5. FieldAttrMaybe :: FieldAttr

    persistent-redis Database.Persist.Redis

    The Maybe keyword goes after the type. This indicates that the column is nullable, and the generated Haskell code will have a Maybe type for it. Example:

    User
    name Text Maybe
    

  6. isFieldMaybe :: FieldDef -> Bool

    persistent-redis Database.Persist.Redis

    Check if the field is `Maybe a`

  7. psMaybe :: MonadReader BridgeData m => m PSType

    purescript-bridge Language.PureScript.Bridge.PSTypes

    Uses type parameters from haskType (bridged).

  8. lookUpVarMaybe :: Typeable a => Env -> Var a -> Maybe a

    quickcheck-dynamic Test.QuickCheck.StateModel

    No documentation available.

  9. suchThatMaybe :: MonadGen m => m a -> (a -> Bool) -> m (Maybe a)

    quickcheck-transformer Test.QuickCheck.GenT

    Tries to generate a value that satisfies a predicate.

  10. mapMaybe :: (a -> Maybe b) -> Patricia a -> Patricia b

    radix-tree Data.Patricia.Word.Lazy

    Apply a function to every value in the tree and create one out of Just values.

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