Arrow to add one element at a time...

Logical OR in HXT without duplicating results...

Using monads, monoids, functors and arrows in practice...

Could not deduce (Semigroup (TimedEvents a))...

A monad is just a monoid in the category of endofunctors, what's the problem?...

Haskell, implementing Monoids. What is Semigroup and why does it act so weird?...

Examples of monoids/semigroups in programming...

What does Traversable is to Applicative contexts mean?...

Don't understand notation of morphisms in Monoid definition...

Is there a class that models "patches"?...

Haskell newtype that flips semigroup operation?...

Is Last a free monoid?...

A monoid can see its elements all in the same shape...

Why is my Semigroup/Monoid instance overlapping?...

For what Alt in Monoid instance needed?...

Confused about why all morphisms for a monoid are not the same as the identity morphism...

How to make my probability density type an instance of Monoid?...

Applicative instance trying to use monoidal functors...

No Monoid instance for Integer...

Identity element for std::min/float monoid...

How are Haskell Monad laws derived from Monoid laws?...

How can I define Pair as a Monoid?...

Writing a Haskell Options Datatype for Safe Query Strings for Fixed API...

Why MonadPlus and not Monad + Monoid?...

What is the main difference between Free Monoid and Monoid?...

Distinction between typeclasses MonadPlus, Alternative, and Monoid?...

Why does the Alternative typeclass need to be a sub-class of Control.Applicative...

Why is there not 'Alternative' instance for 'Control.Applicative.Const'...

Why is there no type class for monoids on functors in Haskell?...

Monoid vs MonadPlus...