Fun puzzle, thanks :) Spoiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . my_proc.binding gives you the execution context, and from there you have my_proc.binding.local_variables to list the local variables in scope, and my_proc.binding.local_variable_get(:secret1) to get at the value. martin On Thu, May 11, 2023 at 4:14 AM hmdne via ruby-talk < ruby-talk@ml.ruby-lang.org> wrote:
If there's an interest in such posts, I will write more. The idea is that I will provide examples of lesser-known features of Ruby. Later on, I will do a longer write-up where I will provide a solution and explain it unless someone will do it before me :)
Let's say I have a program I can't modify:
```ruby def gen_proc secret1 = rand secret2 = rand
proc do p secret1 * secret2 nil end end
my_proc = gen_proc
binding.irb ```
It will launch an interactive Ruby console. When I type:
```ruby my_proc.() # .() is a shortcut of .call() ```
It will print some number, but each time I will type this expression, it will be the same number (until I relaunch the console). This number is derived from `secret1` and `secret2` variables. Those variables are stored somewhere - but where? What is the best way for me to obtain values of those variables? Do note that I can't modify the code :) ______________________________________________ ruby-talk mailing list -- ruby-talk@ml.ruby-lang.org To unsubscribe send an email to ruby-talk-leave@ml.ruby-lang.org ruby-talk info -- https://ml.ruby-lang.org/mailman3/postorius/lists/ruby-talk.ml.ruby-lang.org...