From: Eric Lavigne <lavigne.eric@...>
Date: 2007-11-19T06:08:05+09:00
Subject: Re: [QUIZ] Goedel (#147)

On Nov 18, 2007 3:42 PM, steve <oksteev@yahoo.com> wrote:
> there's an instance var @primes which has the list of already generated
> primes, @primes.last would do it
>

Sounds simple enough, but accessing instance variables seems to be a
rather verbose operation.

Here is what it should look like (if the Prime class worked the way I
originally expected):
   primes = Prime.new
   primes.next.doSomething
   primes.last.doSomethingElse

Here was my first attempt using your suggestion, which looks
reasonable but doesn't work.
   primes = Prime.new
   primes.next.doSomething
   primes.@primes.last.doSomethingElse

Here is what finally worked, but I can't believe the verbosity of the
final line. Is there a shorter way?
   primes = Prime.new
   primes.next.doSomething
   primes.instance_variable_get("@primes").last.doSomethingElse


-- 
There are two ways of constructing a software design: One way is to
make it so simple that there are obviously no deficiencies, and the
other way is to make it so complicated that there are no obvious
deficiencies. The first method is far more difficult.

                    - C.A.R. Hoare -