Exercism Racket Track

Exercism exercises in Racket.

Contributing

Please read about how to get involved in a track. Also, be sure to read the Exercism Code of Conduct.

We welcome both improvements to the existing exercises and the addition of new exercises. If you are creating a new exercise from scratch please see adding new exercises. If you are porting an exercise that exists in other exercism language tracks, see porting an exercise.

Please note that this track's exercises must conform to the Exercism-wide standards described in the documentation. If you're unsure about how to make a change, then go ahead and open an issue on Github.

Each exercise should have an example solution, a description file, a test suite and a stub file for the solution declaring the module and exports.

Naming Conventions

The example solution should be named example.rkt. The description file: README.md. The test suite: <exercise-name>-test.rkt, and the stub: <exercise-name>.rkt.

For example, if you were to work on the binary exercise, you would create and commit the following four files:

$ racket/exercises/binary/
.
├── binary.rkt
├── binary-test.rkt
├── README.md
└── example.rkt

Code Style

The Racket code in this repo is meant to conform with the conventions set forth in How to Program Racket.

Dependencies

Try to avoid external dependencies.

Creating the description file

README.md may be generated from exercism data. The generator will use the description.md from the exercise directory in the problem-specifications repository. To generate README.md for your execise only use the following command from your racket track directory:

bin/configlet generate . --only <exercise-name>

Adding the exercise to config.json

Be sure to add the exercise to an appropriate place in the config.json file. The position in the file determines the order exercises are fetched by users. Generate a unique UUID for the exercise with configlet uuid. Finally check config.json with:

bin/configlet lint .

Opening an Issue

If you plan to make significant or breaking changes, please open an issue so we can discuss it first. If this is a discussion that is relevant to more than just the Racket track, please open an issue in exercism/discussions.

Submitting a Pull Request

Pull requests should be focused on a single exercise, issue, or conceptually cohesive change. Please refer to Exercism's pull request guidelines.

Prior to submitting a pull request, ensure that your test requires the stub file, and not the example file - like so:

#lang racket/base

(require "perfect-numbers.rkt")

(module+ test
  (require rackunit rackunit/text-ui)

  (define suite
    (test-suite
     "perfect numbers tests"

     (test-equal? "no perfect numbers in 1 - 5"
                  (perfect-numbers 5)
                  '())))

  (run-tests suite))

Racket icon

The Racket logo was created by Matthew Butterick and released under the Creative Commons Attribution-Share Alike 3.0 Unported license. We have adapted it, changing the colour scheme for use on Exercism.