Using Unfolds to Iterate in Haskell and OCaml

This post picks up from where we left off here, in which I explained anamorphisms.  Here we look at another example of applying unfolds: iterate.  Iterate Iterate is one of the most common uses of unfold.  The definition of the iterate function is: iterate f x = Cons (x, iterate…

Why Blockchain Engineers Should Learn Functional Programming

As a software engineer who wants to work with blockchains, you may ask: what languages should I learn?  Answers on the internet (e.g., here, here, and here) mostly recommend prominent languages like C++, Python, Java, and Javascript, and the smart contract language Solidity.  None of them mention any functional languages! …

Programming with Lenses in Haskell and OCaml

In this post, I continue going through the famous paper “Functional Programming with Bananas, Lenses, Envelopes and Barbed Wire” by Meijer et al.  They show that we can treat recursions as separate higher order functions known as recursion schemes.  Each of the four things in the paper title corresponds to…