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import Data.Functor ((<$))
main = do 
       let x=1::Int
       let y=Nothing :: Maybe Int
       print (x <$ y :: Maybe Int)

Success #stdin #stdout 0s 5320KB

stdin

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Standard input is empty

stdout

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Nothing

https://ideone.com/290xxB

language:

Haskell (ghc 8.4.4)

created:

visibility:

public

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