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New posts in foldable

Writing a foldMap in Haskell

haskell functor foldable

Why can't I do `null (Just 5)` in Haskell?

haskell ghc typeclass option-type foldable

Why Monoid is not a requirement for foldr/foldl?

haskell fold monoids foldable

Is there an equivalent to head/tail for Foldable functors in general?

haskell functor shift traversable foldable

Is there anything we lose with MonoFoldable?

haskell foldable classy-prelude

No instance for Foldable arising from length inside lambda

haskell lambda foldable

Foldable IntSet

haskell set foldable

Are there laws for the Foldable typeclass that constrain how Foldable instances can be derived?

haskell deriving foldable

Why is this implementation a bad instance of the Foldable Typeclass?

haskell typeclass quickcheck foldable typeclass-laws

Can I write `foldr` (or `foldMap`) in terms of 'recursion schemes' `cata`?

haskell fold recursion-schemes foldable catamorphism

What does Traversable is to Applicative contexts mean?

haskell applicative monoids traversable foldable

Why in Haskell maximum (8,1) = 1? [duplicate]

haskell max foldable

Why does mconcat require a list rather than a Foldable?

haskell monoids foldable

Why isn't sum == foldl1 (+)?

haskell matrix sum fold foldable

Could it be that (Alternative f, Foldable f) => Monad f?

haskell monads typeclass alternative-functor foldable

How can I express foldr in terms of foldMap for type-aligned sequences?

haskell types monoids type-variables foldable

How does Traversable use the fact that it subclasses both Foldable and Functor?

haskell functor traversable foldable

Foldable vs Traversable

haskell functor applicative foldable traversable

Why does `fmap sum Just` typecheck?

haskell functor foldable
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