One similarity which springs to mind is that both (functional programming and circuits) can be described with similar mathematical models. I don't know much of

One similarity which springs to mind is that both (functional programming and circuits) can be described with similar mathematical models. I don't know much of the technical details, but for example see http://conal.net/blog/posts/circuits-as-a-bicartesian-closed-category http://conal.net/blog/posts/circuits-as-a-bicartesian-closed...