Returning data from forked processes

Question

If I do

Process.fork do 
  x 
end 

how can I know what x returned (e.g. true/fase/string) ?

(Writing to a file/database is not an

Answer 1

Yes, you can create a subprocess to execute a block inside.

I recommend the aw gem:

Aw.fork! { 6 * 7 } # => 42

Of course, it prevents from side effects:

arr = ['foo']
Aw.fork! { arr << 'FUU' } # => ["foo", "FUU"]
arr # => ["foo"]