Question

I’m learning functional programming with Clojure. What practical exercises can you recommend? Online repositories with solutions would be perfect.

One idea I can think of is going through all the popular algorithms on sorting, trees, graphs etc. and implementing them in Clojure myself. While it could work, it may be pretty steep and I’m likely to do it inefficiently (compared to someone who knows what she’s doing).

Answer 1

I would recommend doing the Project Euler exercises:

http://projecteuler.net/

Project Euler is a series of
challenging mathematical/computer
programming problems that will require
more than just mathematical insights
to solve. Although mathematics will
help you arrive at elegant and
efficient methods, the use of a
computer and programming skills will
be required to solve most problems.

Because many programmers are solving Project Euler exercises, you can compare the solutions to other (non-functional) programming languages, but also Clojure solutions are available: http://clojure-euler.wikispaces.com/, so you can contrast imperative vs. functional/idiomatic Clojure.

Of course you will learn the most by first doing the exercises yourself, without consulting any of the solutions.