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Within LTS Haskell 22.19 (ghc-9.6.4)
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base-compat-batteries Data.Monoid.Compat The monoid of endomorphisms under composition.
>>> let computation = Endo ("Hello, " ++) <> Endo (++ "!") >>> appEndo computation "Haskell" "Hello, Haskell!"
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base-compat-batteries Data.Monoid.Compat No documentation available.
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base-compat-batteries Data.Semigroup.Compat The monoid of endomorphisms under composition.
>>> let computation = Endo ("Hello, " ++) <> Endo (++ "!") >>> appEndo computation "Haskell" "Hello, Haskell!"
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base-compat-batteries Data.Semigroup.Compat No documentation available.
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relude Relude.Monoid The monoid of endomorphisms under composition.
>>> let computation = Endo ("Hello, " ++) <> Endo (++ "!") >>> appEndo computation "Haskell" "Hello, Haskell!"
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relude Relude.Monoid No documentation available.
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first-class-families Fcf.Class.Monoid.Types Endofunctions.
Details
This is is used in the default implementation of Foldr in terms of FoldMap. Endo :: (a -> Exp a) -> Endo afirst-class-families Fcf.Class.Monoid.Types No documentation available.
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ghc-lib-parser GHC.Core.TyCo.FVs The monoid of endomorphisms under composition.
>>> let computation = Endo ("Hello, " ++) <> Endo (++ "!") >>> appEndo computation "Haskell" "Hello, Haskell!"
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ghc-lib-parser GHC.Core.TyCo.FVs No documentation available.