New posts in Foldable

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

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

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

What does Traversable is to Applicative contexts mean?

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

Foldr/Foldl for free when Tree is implementing Foldable foldMap?