[erlang-questions] [ANN] TryErl: run Erlang code online

[Vladimir Dronnikov]

```
% -*- coding: utf8 -*-
-module(bomb).
-export([loop/0, main/0]).
-import(lists, [map/2]).
-import(pg2, [pid/0, join/2, get_members/1]).

loop() ->
  join(forks, pid()),

  receive
    _ -> spawn(bomb, loop, []),
         loop()
  end.

main(_) ->
  spawn(bomb, loop, []),

  case get_members(forks) of
    [Pid|Pids] -> map(fun(P) -> P ! 1 end, [Pid|Pids]);
    _ -> error
  end,
  main(1).

main() -> main(0).
```
exposes some internal guts to the browser ;) Please check if it's harmless.
Good resource. Thank you.
--V

On Wed, Feb 11, 2015 at 3:24 PM, Сергей Прохоров <seriy.pr@REDACTED> wrote:

> I'm glad to announce a service, which allow to run arbitrary Erlang code
> from your browser. For now it is there:
>
> http://tryerl.seriyps.ru/
>
> How it works
> Each request is handled by Cowboy web server, which launches new Erlang VM
> instance per request inside lightweight linux container, based on
> https://github.com/thestinger/playpen. There are restrictions on
> networking, memory and execution time, but nothing else.
>
> What does it have
> As you already heard, there is erlang code evaluation, but also
> compilation to several intermediate formats, like core erlang, macros
> expanding, beam and erlang assemblers and so on. And all this can be
> launched under any erlang release version (for now it's only the latter 8,
> but I can add more by demand).
> Of course, there is 'pastebin' functionality, so you can save and share
> snippet with somebody else.
>
> Possible use-cases:
> * Explore code compatibility with all Erlang releases
> * Share runnable erlang snippet with somebody
> * Try to launch some dangerous code
> * Quickly explore how your code is compiled to erlang asm instructions
> * Maybe, for some online studying / webinars. Students are don't even need
> to install erlang on their computers
> * In blog posts / articles / documentation - to make code snippets more
> interactive
>
> Idea was borrowed from https://play.rust-lang.org/.
>
> P.S.: it will be great, if you suggest some funny / interesting code
> snippets for <<Examples>> section.
>
> _______________________________________________
> erlang-questions mailing list
> erlang-questions@REDACTED
> http://erlang.org/mailman/listinfo/erlang-questions
>
>
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