From: Florian Gross <flgr@...>
Date: 2004-11-11T22:48:29+09:00
Subject: Re: array.each restart when array is changed

Carlos wrote:

>>Does 'retry' recall the method associated with its block?
> 
> Yes, and re-evaluates its arguments (if any).
> 
> Inside a method, it seems to recall the method (re-evaluating arguments)
> only if the method has a block, altough you are not inside it. Didn't test
> that much.

Wow, this might be very powerful. Using it we can implement a custom 
while() without using a lambda for the condition:

def _while(condition)
   if condition then
     yield
     retry
   end
end

i = 0
_while(i < 10) { i += 1 }
i # => 10

I wonder if this is by purpose or an accidental feature. I think it 
would make some pretty interesting things possible if it can be relied on.