Hoogle Search

Within LTS Haskell 24.28 (ghc-9.10.3)

Note that Stackage only displays results for the latest LTS and Nightly snapshot. Learn more.

Exact lookup

1. expectJust :: HasCallStack => String -> Maybe a -> a

   ghc	GHC.Data.Maybe

   No documentation available.

2. firstJust :: Maybe a -> Maybe a -> Maybe a

   ghc	GHC.Data.Maybe

   No documentation available.

3. firstJusts :: Foldable f => f (Maybe a) -> Maybe a

   ghc	GHC.Data.Maybe

   Takes a list of Maybes and returns the first Just if there is one, or Nothing otherwise.

4. firstJustsM :: (Monad m, Foldable f) => f (m (Maybe a)) -> m (Maybe a)

   ghc	GHC.Data.Maybe

   Takes computations returnings Maybes; tries each one in order. The first one to return a Just wins. Returns Nothing if all computations return Nothing.

5. whenIsJust :: Monad m => Maybe a -> (a -> m ()) -> m ()

   ghc	GHC.Data.Maybe

   No documentation available.

6. adjust :: (a -> a) -> Key -> Word64Map a -> Word64Map a

   ghc	GHC.Data.Word64Map.Internal

   Adjust a value at a specific key. When the key is not a member of the map, the original map is returned.

   adjust ("new " ++) 5 (fromList [(5,"a"), (3,"b")]) == fromList [(3, "b"), (5, "new a")]
   adjust ("new " ++) 7 (fromList [(5,"a"), (3,"b")]) == fromList [(3, "b"), (5, "a")]
   adjust ("new " ++) 7 empty                         == empty
   

7. adjustWithKey :: (Key -> a -> a) -> Key -> Word64Map a -> Word64Map a

   ghc	GHC.Data.Word64Map.Internal

   Adjust a value at a specific key. When the key is not a member of the map, the original map is returned.

   let f key x = (show key) ++ ":new " ++ x
   adjustWithKey f 5 (fromList [(5,"a"), (3,"b")]) == fromList [(3, "b"), (5, "5:new a")]
   adjustWithKey f 7 (fromList [(5,"a"), (3,"b")]) == fromList [(3, "b"), (5, "a")]
   adjustWithKey f 7 empty                         == empty
   

8. adjust :: (a -> a) -> Key -> Word64Map a -> Word64Map a

   ghc	GHC.Data.Word64Map.Lazy

   Adjust a value at a specific key. When the key is not a member of the map, the original map is returned.

   adjust ("new " ++) 5 (fromList [(5,"a"), (3,"b")]) == fromList [(3, "b"), (5, "new a")]
   adjust ("new " ++) 7 (fromList [(5,"a"), (3,"b")]) == fromList [(3, "b"), (5, "a")]
   adjust ("new " ++) 7 empty                         == empty
   

9. adjustWithKey :: (Key -> a -> a) -> Key -> Word64Map a -> Word64Map a

   ghc	GHC.Data.Word64Map.Lazy

   Adjust a value at a specific key. When the key is not a member of the map, the original map is returned.

   let f key x = (show key) ++ ":new " ++ x
   adjustWithKey f 5 (fromList [(5,"a"), (3,"b")]) == fromList [(3, "b"), (5, "5:new a")]
   adjustWithKey f 7 (fromList [(5,"a"), (3,"b")]) == fromList [(3, "b"), (5, "a")]
   adjustWithKey f 7 empty                         == empty
   

10. adjust :: (a -> a) -> Key -> Word64Map a -> Word64Map a

    ghc	GHC.Data.Word64Map.Strict

    Adjust a value at a specific key. When the key is not a member of the map, the original map is returned.

    adjust ("new " ++) 5 (fromList [(5,"a"), (3,"b")]) == fromList [(3, "b"), (5, "new a")]
    adjust ("new " ++) 7 (fromList [(5,"a"), (3,"b")]) == fromList [(3, "b"), (5, "a")]
    adjust ("new " ++) 7 empty                         == empty
    

Page 35 of many | Previous | Next