From: Gregory Brown <gregory.t.brown@...>
Date: 2008-07-31T05:16:51+09:00
Subject: Re: Loop behavior not understood (newbie)

On Wed, Jul 30, 2008 at 4:07 PM, Thomas Luedeke
<thomas.luedeke@areva.com> wrote:
> Gregory Brown wrote:

> OK, your version seems to work.  I'm confused, however, because I don't
> see the functional difference between your coding and mine.  What was
> the error in my coding previously??  Why did it not know how to print to
> the intended file??

The primary functional difference is that when you use the block form
of File.open(), it closes the file handle for you.  Your code was not
properly closing the files.
It still wrote out a file on my machine, but running under eclipse may
be different.

If you'd like to try to verify that, add these two lines to the end of
your file:

detailedModel.close
detailedModelModified.close

The rest was just making the code more conventional so that others
will have an easier time reading it.
If you're interested in those, here's what I did:

1. named variables like_this instead of likeThis.

2. used the block form of File to avoid having to manually call File#close

3. Avoided comparing to a boolean.  if (something) is the same as if
(something == false), unless you want to prevent nil objects from
evaluating as false.
Everything in Ruby except false and nil are true.

4. Removed the unnecessary 'then' syntax.

5. Shortened the skip line by using the conditional modifier:
do_something if some_condition

Although it's of course not necessary to write things this way, it is
more idiomatic, which makes it easier for people on this list to read
it and help you.

Try closing the files in the code you provided, and see if that works.
 If it doesn't, I feel it's a bit of an Eclipse mystery.

-greg