Permutive

Community engineering report

February 2020

Towards a better API for I/O

Iteratees in Haskell

The core premise of Iteratees (and their ideologically similar derivatives such as fs2 in Scala and pipes and conduit in Haskell) is that there are three properties you should seek in an I/O API:

Community engineering report

January 2020

Community engineering report

October 2019

Permutive Community Engineering, October 2019

The community engineering team was at 75% capacity in October (I was out for a week of vacation), but we were able to wrap up several projects and kick off a…

Community engineering report

September 2019

Permutive Community Engineering, September 2019

This article gives a summary of projects that I worked on in my second month on the Community Engineering team at Permutive. For more context about these…

Fun with mutually-recursive typeclass resolution

Automatically deriving InputTypes in Sangria with Shapeless

At Permutive we’ve recently started experimenting with GraphQL, via Sangria. During that process I’ve had to write a few…

Having your cake and eating it

Pure, mutable state in Haskell with the ST monad

At Permutive, we’re committed to functional programming. That typically means also committing to immutable data structures (a very good thing!), but there are times when…