Hoogle Search

Within LTS Haskell 24.6 (ghc-9.10.2)

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Exact lookup

1. lookup :: (Eq k, Hashable k) => k -> InsOrdHashMap k v -> Maybe v

   insert-ordered-containers	Data.HashMap.Strict.InsOrd

   No documentation available.

2. lookup :: (Ord k, Hashable k) => k -> Store k v -> Maybe (v, Store k v)

   wreq	Network.Wreq.Cache.Store

   No documentation available.

3. lookup :: CI ByteString -> Headers -> Maybe ByteString

   snap-core	Snap.Types.Headers

   Look up the value of a given HTTP header field. Example:

   ghci> :set -XOverloadedStrings
   ghci> H.lookup "host" $ H.fromList [("Host", "localhost")]
   Just "localhost"
   ghci> H.lookup "Accept" $ H.fromList [("Host", "localhost")]
   Nothing
   

4. lookup :: Enum k => k -> EnumMap k a -> Maybe a

   enummapset	Data.EnumMap.Lazy

   No documentation available.

5. lookup :: Enum k => k -> EnumMap k a -> Maybe a

   enummapset	Data.EnumMap.Strict

   No documentation available.

6. lookup :: Eq a => a -> [(a, b)] -> Maybe b

   ghc-internal	GHC.Internal.Data.List

   lookup key assocs looks up a key in an association list. For the result to be Nothing, the list must be finite.

   Examples

   >>> lookup 2 []
   Nothing
   

   >>> lookup 2 [(1, "first")]
   Nothing
   

   >>> lookup 2 [(1, "first"), (2, "second"), (3, "third")]
   Just "second"
   

7. lookup :: Eq a => a -> [(a, b)] -> Maybe b

   ghc-internal	GHC.Internal.Data.OldList

   lookup key assocs looks up a key in an association list. For the result to be Nothing, the list must be finite.

   Examples

   >>> lookup 2 []
   Nothing
   

   >>> lookup 2 [(1, "first")]
   Nothing
   

   >>> lookup 2 [(1, "first"), (2, "second"), (3, "third")]
   Just "second"
   

8. lookup :: Eq a => a -> [(a, b)] -> Maybe b

   ghc-internal	GHC.Internal.List

   lookup key assocs looks up a key in an association list. For the result to be Nothing, the list must be finite.

   Examples

   >>> lookup 2 []
   Nothing
   

   >>> lookup 2 [(1, "first")]
   Nothing
   

   >>> lookup 2 [(1, "first"), (2, "second"), (3, "third")]
   Just "second"
   

9. lookup :: Ord k => k -> OMap k v -> Maybe v

   th-desugar	Language.Haskell.TH.Desugar.OMap

   No documentation available.

10. lookup :: Ord k => k -> OMap k v -> Maybe v

    th-desugar	Language.Haskell.TH.Desugar.OMap.Strict

    No documentation available.

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