Blog.

Let's say we're going to be writing some code that needs to know the current time. It would be inefficient to have to recalculate the current time whenever it's ...

FP Complete is an advanced software company specializing in sophisticated server side applications performing scientific data computation. Our toolchain includes ...

I'd really intended to write a blog post on a different topic this week. But given that I did some significant refactoring in the Stack codebase related to a number of ...

For the past few years, Francesco Mazzoli and I have discussed issues around monad transformers—and the need to run their actions in IO—on a fairly regular basis. I ...

NOTE This blog post made the rounds last week before the branch was actually merged and the post was still on a review server. I'm officially publishing it as the pull ...

Streaming data is a problem domain I've played with a lot in Haskell. In Haskell, the closest we come to built-in streaming data support is laziness-by-default, which ...

This is a debugging story told completely out of order. In order to understand the ultimate bug, why it seemed to occur arbitrarily, and the ultimate resolution, there's ...

This blog post came out of two unrelated sets of questions I received last week about usage of the resourcet library. For those unfamiliar with it, the library is often ...

Often times I'll receive or read questions online about "design patterns" in Haskell. A common response is that Haskell doesn't have them. What many languages address ...

In the last post, we covered the following: