> lenses solve a problem that no other language has Indeed other languages don't have problems dealing with immutable collections since almost none have good i

> lenses solve a problem that no other language has Indeed other languages don't have problems dealing with immutable collections since almost none have good immutable collections. All I can say is that, when working with other languages, I wish they did have that problem! > most Haskell programs seem to me to be completely unreadable by anyone except the author Interesting. That's the opposite of my experience. Haskell is pretty much the only language where I expect to be able to read code written by others ("others" including "myself a year ago").