From: Joshua Collins <kidguko@...>
Date: 2009-05-15T02:34:50+09:00
Subject: Re: find previous & next in array

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Bobby, I am new too, so I might be missing something as well.

I tried your method first, and when I tried to do the symbol in irb it gave
an error. Maybe you have settings I do not?

On Thu, May 14, 2009 at 11:38 AM, John Griffiths <indiehead@gmail.com>wrote:

> > The safest is probably
> >
> > i = a.index('c')
> >
> > if i
> >   predecessor = i > 0 ? a[i -1] : nil
> >   successor = a[i + 1] # safe!
> > end
> >
> > Or as a variant
> >
> > i = a.index('c') and begin
> >   predecessor = i > 0 ? a[i -1] : nil
> >   successor = a[i + 1] # safe!
> > end
> >
> > Kind regards
> >
> > robert
>
> thanks Robert, i was trying to build up a little function to find the
> prev/next elements in an array, thanks to your help it's sorted;
> couldn't find a solution online. appreciate it all.
>
>
> John.
> --
> Posted via http://www.ruby-forum.com/.
>
>

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