_ _ ____ _ _ _
| \ | |/ ___| \ | | | |
| \| | | _| \| | __| |__
| |\ | |_| | |\ | / _ _ \
|_| \_|\____|_| \_| / / | | \ \
_ ____ _ | | | | | |
/ \ | _ \| | \ \_| |_/ /
/ _ \ | |_) | | \__ __/
/ ___ \| __/| |___ ____| |____
/_/ \_\_| |_____| |___________|

An APL compiler written in CoffeeScript
Runs on NodeJS or in a browser

In-browser demo (See also: Paul L Jackson's web site and repl.it)

Supports: most primitives, dfns ({⍺ ⍵}), nested arrays, complex numbers (1j2), infinities (¯ or ∞), forks and hooks, strand assignment ((a b)←c), index assignment (a[b]←c), user-defined operators ({⍺⍺ ⍵⍵})

Doesn't support: traditional functions (∇R←X f Y), non-zero index origin (⎕IO), comparison tolerance (⎕CT), prototypes, NaN-s, modified assignment (x+←1), control structures (:If), object-oriented features, namespaces

Usage

Install NodeJS.

Download apl.js and make it executable:

wget http://ngn.github.io/apl/lib/apl.js
chmod +x apl.js

Running ./apl.js without arguments starts a REPL.

Running it with an argument executes an APL script:

./apl.js filename.apl

It can be require()d as a CommonJS module:

var apl = require('./apl');
console.log(apl('1 2 3 + 4 5 6').toString());

or used in an HTML page:

<script src="http://ngn.github.io/apl/lib/apl.js"></script>
<script>
var result = apl('1 2 3 + 4 5 6'); // apl is a global variable
</script>

Editor support

Vim keymap and syntax