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Within LTS Haskell 24.36 (ghc-9.10.3)

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Exact lookup

1. lookupDefault :: Configured a => a -> Config -> Name -> IO a

   configurator	Data.Configurator

   Look up a name in the given Config. If a binding exists, and the value can be converted to the desired type, return it, otherwise return the default value.

2. lookupContext :: FromContext a b => Text -> Context a -> Maybe b

   doctemplates	Text.DocTemplates

   No documentation available.

3. lookupContext :: FromContext a b => Text -> Context a -> Maybe b

   doctemplates	Text.DocTemplates.Internal

   No documentation available.

4. lookupComparison :: String -> TypeRep -> [Expr] -> Maybe Expr

   express	Data.Express

   O(n). Lookups for a comparison function (:: a -> a -> Bool) with the given name and argument type.

5. lookupName :: [Expr] -> Expr -> String

   express	Data.Express

   O(n+m). Like name but lifted over an instance list and an Expr.

   > lookupName preludeNameInstances (val False)
   "p"
   

   > lookupName preludeNameInstances (val (0::Int))
   "x"
   

   This function defaults to "x" when no appropriate name is found.

   > lookupName [] (val False)
   "x"
   

6. lookupNames :: [Expr] -> Expr -> [String]

   express	Data.Express

   O(n+m). A mix between lookupName and names: this returns an infinite list of names based on an instances list and an Expr.

7. lookupComparison :: String -> TypeRep -> [Expr] -> Maybe Expr

   express	Data.Express.Instances

   O(n). Lookups for a comparison function (:: a -> a -> Bool) with the given name and argument type.

8. lookupName :: [Expr] -> Expr -> String

   express	Data.Express.Instances

   O(n+m). Like name but lifted over an instance list and an Expr.

   > lookupName preludeNameInstances (val False)
   "p"
   

   > lookupName preludeNameInstances (val (0::Int))
   "x"
   

   This function defaults to "x" when no appropriate name is found.

   > lookupName [] (val False)
   "x"
   

9. lookupNames :: [Expr] -> Expr -> [String]

   express	Data.Express.Instances

   O(n+m). A mix between lookupName and names: this returns an infinite list of names based on an instances list and an Expr.

10. lookupId :: Eq a => a -> [(a, a)] -> a

    express	Data.Express.Utils.List

    O(n). Like lookup but returns the key itself if nothing is found.

    > lookupId 5 [(1,2),(3,4)]
    5
    

    > lookupId 5 [(1,2),(3,4),(5,6)]
    6
    

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