Haskell lets you write beautiful, modular code. Rather than waffle generally, I’ll use this talk to look at a particular example, Edward Kmett’s lovely lens library. Lenses have been called “jQuery for data types”: they give you a way to poke around in the...

When writing programs, it often turns out to be useful to separate the description of what to do from a concrete implementation that actually performs the actions. You can do so by turning your descriptions into pure data. Then you can analyze them, transf...

Embedded domain specific language is a particular flavor of a library with domain specific syntax, functions and types. Solutions to many problems naturally gravitate to finally take the form of an EDSL. Haskell is a particularly good host language for EDS...