Monthly Hask Anything (September 2022)

This page summarizes the projects mentioned and recommended in the original post on /r/haskell

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  • Cabal

    Official upstream development repository for Cabal and cabal-install

    Sometimes cabal's output is confusing with regards to optimization levels:

  • ghc

    Mirror of the Glasgow Haskell Compiler. Please submit issues and patches to GHC's Gitlab instance ( First time contributors are encouraged to get started with the newcomers info (

    bss@monster % ghci GHCi, version 8.8.4: :? for help Loaded GHCi configuration from /home/bss/.ghc/ghci.conf GHCi> :t foldMap foldMap :: (Foldable t, Monoid m) => (a -> m) -> t a -> m GHCi> :t fold :1:1: error: • Variable not in scope: fold • Perhaps you meant one of these: ‘foldl’ (imported from Prelude), ‘foldr’ (imported from Prelude) GHCi> :t Data.Foldable.fold Data.Foldable.fold :: (Foldable t, Monoid m) => t m -> m GHCi> :t foldMap id foldMap id :: (Foldable t, Monoid m) => t m -> m

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  • adhoc-fixtures

    Helps improves tests crafting per-test fixtures

    See the full project.

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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