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Exact lookup

1. lookupKnownProgram :: String -> ProgramDb -> Maybe Program

   Cabal	Distribution.Simple.Program.Db

   No documentation available.

2. lookupProgram :: Program -> ProgramDb -> Maybe ConfiguredProgram

   Cabal	Distribution.Simple.Program.Db

   Try to find a configured program

3. lookupProgramByName :: String -> ProgramDb -> Maybe ConfiguredProgram

   Cabal	Distribution.Simple.Program.Db

   Try to find a configured program

4. lookupProgramVersion :: Verbosity -> Program -> VersionRange -> ProgramDb -> IO (Either CabalException (ConfiguredProgram, Version, ProgramDb))

   Cabal	Distribution.Simple.Program.Db

   Check that a program is configured and available to be run. Additionally check that the program version number is suitable and return it. For example you could require AnyVersion or orLaterVersion (Version [1,0] []) It returns the configured program, its version number and a possibly updated ProgramDb. If the program could not be configured or the version is unsuitable, it returns an error value.

5. lookupByConstructorName :: Name -> DatatypeInfo -> ConstructorInfo

   th-abstraction	Language.Haskell.TH.Datatype

   Given a DatatypeInfo, find the ConstructorInfo corresponding to the Name of one of its constructors.

6. lookupByRecordName :: Name -> DatatypeInfo -> ConstructorInfo

   th-abstraction	Language.Haskell.TH.Datatype

   Given a DatatypeInfo, find the ConstructorInfo corresponding to the Name of one of its constructors.

7. lookupAll :: Text -> Form -> [Text]

   http-api-data	Web.FormUrlEncoded

   Find all values corresponding to a given key in a Form.

   >>> lookupAll "name" []
   []
   
   >>> lookupAll "name" [("name", "Oleg")]
   ["Oleg"]
   
   >>> lookupAll "name" [("name", "Oleg"), ("name", "David")]
   ["Oleg","David"]
   

8. lookupMaybe :: Text -> Form -> Either Text (Maybe Text)

   http-api-data	Web.FormUrlEncoded

   Lookup an optional value for a key. Fail if there is more than one value.

   >>> lookupMaybe "name" []
   Right Nothing
   
   >>> lookupMaybe "name" [("name", "Oleg")]
   Right (Just "Oleg")
   
   >>> lookupMaybe "name" [("name", "Oleg"), ("name", "David")]
   Left "Duplicate key \"name\""
   

9. lookupUnique :: Text -> Form -> Either Text Text

   http-api-data	Web.FormUrlEncoded

   Lookup a unique value for a key. Fail if there is zero or more than one value.

   >>> lookupUnique "name" []
   Left "Could not find key \"name\""
   
   >>> lookupUnique "name" [("name", "Oleg")]
   Right "Oleg"
   
   >>> lookupUnique "name" [("name", "Oleg"), ("name", "David")]
   Left "Duplicate key \"name\""
   

10. lookupAll :: Text -> Form -> [Text]

    http-api-data	Web.Internal.FormUrlEncoded

    Find all values corresponding to a given key in a Form.

    >>> lookupAll "name" []
    []
    
    >>> lookupAll "name" [("name", "Oleg")]
    ["Oleg"]
    
    >>> lookupAll "name" [("name", "Oleg"), ("name", "David")]
    ["Oleg","David"]
    

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