You are most welcome. It did take some work, but it was also a lot of fun. I’m a bit of a puzzle junkie, and Project Euler is a superb collection.

‘Real’ programming, the kind we get paid to do, often involves challenges such as crushing time constraints, incomplete and changing specifications, legacy tools, and insane complexity due to reasons all too familiar. It is a pleasure to spend time in the place where mathematics and programming meet, where problems are crisply defined, and where I can choose my weapons. I was a functional programmer before it was hip, and I very much want to see functional programming become a dominant paradigm. If I can help someone to see that fp can be elegant, simple, and fun, I will be pleased. That’s why I put this together.

We are fortunate to live in a time when amazing tools such as Clojure, Leiningen, Marginalia, Mercurial, and Emacs are available for the asking. I am grateful to be the beneficiary of so much work by so many gifted individuals. I hope they too are having fun. And special thanks to Project Euler. You guys rock.

Thanks for the kind words, I appreciate them.

Something that slipped by me was an absolute file path in problem 22, that should have been a relative path. This pointed out to me by @danieroux in a pull request. I have since corrected the path in the repo.

David

Thanks for the suggestion. I know of Cake, but have never used it. I’ll make a point of checking it out when I get a chance. The Clojure world is fortunate in that its ecosystem is becoming diverse enough to give us some real choices.

Brian,
As you point out, both ML and Haskell’s notation were borrowed from mathematics, and a good notation is a thing of beauty. I like this quote from A. N. Whitehead:

… This example shows that, by the aid of symbolism, we can make transitions in reasoning almost mechanically by the eye, which otherwise would call into play the higher faculties of the brain.

It is a profoundly erroneous truism, repeated by all copy-books and by eminent people when they are making speeches, that we should cultivate the habit of thinking of what we are doing. The precise opposite is the case. Civilization advances by extending the number of important operations which we can perform without thinking about them.

BTW, see you tomorrow night at Trifunc.

My policy with Leiningen (which I took from Rubinius) is that if you have a patch accepted you may have commit rights, so send me a message on Github if you want to get hooked up.

(comp (mapp f) (mapp g)) = (mapp (comp f g))

…where the same operations are used on both sides.

– MarkusQ