APLamp

APL playground that runs in the browser. REPL, on-screen APL keyboard, glyph reference, and a pile of exercises. Static site, no backend.

Running it

Needs Node 20+ and npm 10+.

npm install
npm run dev
npm run build
npm test

What's in here

Interpreter written from scratch in TypeScript: tokenizer, parser, evaluator, primitives, formatter. No APL engine pulled in as a dependency.

UI is React 18 with Tailwind and a few Radix primitives. i18next handles English and Italian; the language is picked from the browser and kept in localStorage.

Two input modes: native APL (each physical key maps to its glyph) and ASCII with Alt-prefix shortcuts.

A lot of exercises, each with a reference solution the test suite checks.

Deploying

Push to main and the GitHub Pages workflow builds and publishes. For a different host, tweak base in vite.config.ts and serve dist/ from wherever.

License

See LICENSE.