From: Jano Svitok <jan.svitok@...>
Date: 2007-06-07T19:41:53+09:00
Subject: Re: Mutually-Recursive Functions

On 6/7/07, Revence Kalibwani <revence27@gmail.com> wrote:
> Bruno Michel wrote:
> > For the even and odd example, it works if you remplace odd by my_odd
> > in the my_even function, and even by my_even in the my_odd function.
> > Like this:
> >
> > def my_even(x)
> >   x == 0 or my_odd(x - 1)
> > end
> >
> > def my_odd(x)
> >   x != 0 and my_even(x - 1)
> > end
> >
> > my_even(10) #=> true
> >
> >
> > Hope this helps.
> >
> Yeah. Solved it. Lots of typos. That happens under stress. Thanks a lot,
> everyone. :-)

For this very case, String#succ and String.succ! might be helpful
('A'.succ -> 'B', 'Z'.succ -> 'AA').