4ever-clojure

Unfortunately 4clojure is shutting down: https://twitter.com/borkdude/status/1412117420173561861

Original thread that explains why 4clojure is shutting down: https://groups.google.com/g/clojure/c/ZWmDEzvn-Js

Now that 4clojure is shutting down (thanks for all the year of hosting it!), perhaps it's time to consider some alternatives. - borkdude

@borkdude suggested this in his tweet:

Another alternative would be to port it to self-hosted CLJS or sci and host it on Github pages and use localstorage. No need to maintain a running JVM server somewhere that way. Perhaps with the option to download your solutions as an archive.

And so I made it, using the awesome sci and special thanks to 4bb from where I copied the problems edn.

Live

Deployed at https://4clojure.oxal.org/

Solutions archive

You can view the solutions from each individual page eg: https://4clojure.oxal.org/#/problem/102/solutions

The archive repo is available at: https://github.com/oxalorg/4clojure-solutions-archive/

Develop

The easiest way to start up a local server would be to install Babashka and run the dev script defined in bb.edn:

bb dev

Alternatively, you can carry out the instructions of the Babashka script manually:

npm install # only needed once
cp "public/index.template.html" "public/index.html"
npx shadow-cljs watch :my-build

If you are a fan of emacs and cider, then you can open up emacs and run cider-jack-in-cljs. It will automatically start shadow-cljs in watch mode.

shadow hosts the dev server at http://localhost:8000

Test your own version live

You can deploy your own instance via GitHub Actions:

1. Go to Settings -> Pages
2. Choose Build and deployment -> Github Actions
3. Upload your repository or trigger the build

Todos

• Ship a crude version
• Make it noice!
• use localstorage to store solutions
• easy navigation
• scrape problem difficulty (can perhaps also get ranks data?)
• better alerts (modals?)
• show user which problems they have solved
• import /export data of the user in a .edn file
• github actions auto deployment
• create a new section of problems "community powered questions"
• add new community problems directly via github