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Project Euler in Clojure

Project Euler (http://projecteuler.net) is an addictive and fun way to learn a new language and practice your craft. This repository is a scaffold for solving Euler problems using Clojure. It generates specs and solution stubs in an organized structure, making life just a little bit better.

Install

  1. If you don't have Leiningen installed, download this script and add it to you path.

  2. Check out this project:

     $ git clone [email protected]:slagyr/euler.git

  3. Download dependencies:

     $ lein deps

  4. Run the specs:

     $ lein spec
 F
 1)
 'Euler Problem #1 Solves #1' FAILED
 Expected: <-1>
      got: nil (using =)
 /Users/micahmartin/Projects/clojure/euler/problem001_spec.clj:11
 Finished in 0.00288 seconds
 1 examples, 1 failures

Usage

Problem #1

Euler Problem #1 is ready to go with two files pre-generated:

  1. spec file: spec/euler/level1/problem001_spec.clj
  2. source file: src/euler/level1/problem001.clj

In the source file you'll fine a link to the problem on the Project Euler web site. Plan your solution then write a test, make it pass, repeat. Each generated spec file contains one example (or test), that you'll need to edit. Feel free to add more.

Starting the Next Problem

When you're ready for a new problem, generate stubs. A Leiningen task has been provided to do this for you. Simple provide the problem number.

$ lein euler 2
writing 247 bytes to spec/euler/level1/problem002_spec.clj
writing 52 bytes to src/euler/level1/problem002.clj

Running Specs

Run all the specs:

$ lein spec

Run one spec or one directory

$ lein spec spec/euler/<file or dir name>

My favorite way to run the spec is to use the auto runner. Start her up and she'll run specs every time you touch a file.

$ lein spec -a

or for nicer output (for reasons we won't go into, commands run using Leiningen get whitespace stripped)

$ java -cp `lein classpath` speclj.main -a -c

Have Fun

Remember this is a learning exercise. There's plenty of stuff to practice:

  • Clojure
  • Writing Clean Code
  • TDD/BDD
  • Good Design
  • Refactoring
  • Organization

Contribute

Contributions are welcome. Just submit a pull request.

License

Copyright (C) 2011 Micah Martin

Distributed under the MIT License.