Category Archives: algebra

Lens, State Is Your Father

In our last post, we introduced IOCoalgebras as an alternative way of representing coalgebras from an algebraic viewpoint, where Lens was used as a guiding example. In fact, lens is an abstraction that belongs to the group of Optics, a … Continue reading

Posted in algebra, coalgebra, Lens, Optics, State, Type Class | Leave a comment

Yo Dawg, We Put an Algebra in Your Coalgebra

As Dan Piponi suggested in Cofree Meets Free, we may think of coalgebraic things as machines with buttons. In this post, we take this metaphor seriously and show how we can use algebras to model the Input/Output interface of the … Continue reading

Posted in algebra, coalgebra, Embedded DSLs, machine, Scala, Type Class | 2 Comments