From: Gregory Brown <gregory.t.brown@...>
Date: 2009-07-28T23:32:17+09:00
Subject: Re: Unexpected output in a metaprogramming application

On Mon, Jul 27, 2009 at 11:15 PM,
RichardOnRails<RichardDummyMailbox58407@uscomputergurus.com> wrote:
> Hi,,
>
> I putting together examples I might use in teaching an elementary Ruby
> seminar.  for the moment, I like to code examples inside a method that
> displays both the code and the result of the code's execution.
>
> I pasted both the code and the output presented by running the code
> under SciTE at http://www.pastie.org/561156.
>
> My problem is the spurious final line of output from the show method:
> "1256921" from Example 4.  I like to learn why that's generated so
> that I can eliminate it.  I repeated the Example 4 code out of the
> "show" context,  and it executed as I expected, i.e. no "1256921" ws
> generated.

this is because the return value of your eval() code is the last
statement executed, which is Array#each

>> [1,2,3].each { }.to_s
=> "123"