lein-fore-prob

A leiningen plugin which given a problem from 4clojure will populate the current project’s tests with the problem’s tests. This is based on lein-foreclojure-plugin code updated for Leiningen 2.

Usage

Add the plugin in your ~/.lein/profiles.clj:

{:user {:plugins [ ; ... other plugins ...
                  [lein-fore-prob "0.1.3"]]}}

Create a project to store 4clojure problems:

lein new probs-from-4clj
cd probs-from-4clj

Then use the plugin:

lein fore-prob [open] <problem id> [<problem id> ...]

You can use multiple problem ids at the same time. Use the open subcommand to open these problems in a browser instead of adding it to the current project.

What’s added

Given a new project like this:

.
├── ...
├── project.clj
├── src
│   └── probs_from_4clj
│       └── core.clj
└── test
    └── probs_from_4clj
        └── core_test.clj

A stub function will be added to src/probs_from_4clj/core.clj e.g for problem 98 an equivalence-classes-solution function is defined. Then in test/probs_from_4clj/core_test.clj the tests for that problem will be added e.g. again for problem 98 the test would be can-equivalence-classes. At that point you can flesh out the function until the test passes then copy it over to 4clojure.org when you’re happy with it.

Example

Here is what lein fore-prob 43 would add:

;; in src/your-project/core.clj:

;; problem 43 (Medium)
(defn reverse-interleave-solution
  [& args] ;; update args as needed
  ;; Write a function which reverses the interleave process into x number of subsequences.
  nil)


;; in test/your-project/core_test.clj:

;; problem 43
(deftest can-reverse-interleave
  (is (= (reverse-interleave-solution [1 2 3 4 5 6] 2) '((1 3 5) (2 4 6))))
  (is (= (reverse-interleave-solution (range 9) 3) '((0 3 6) (1 4 7) (2 5 8))))
  (is (= (reverse-interleave-solution (range 10) 5) '((0 5) (1 6) (2 7) (3 8) (4 9)))))

License

Copyright © 2014-2019 Baptiste Fontaine

Original code:

Copyright © 2011 Dan Brook

Distributed under the Eclipse Public License, the same as Clojure.