From: Trans <transfire@...>
Date: 2008-08-20T07:53:02+09:00
Subject: Re: Fools Filing



On Aug 19, 2:45 am, Michael Morin <uzimon...@gmail.com> wrote:
> Trans wrote:
> > My immediate thought was then, what about Dir, does it support #glob?
> > That was immediately followed by, "hey, I never ever use Dir.new".
> > That was key. I looked it up:
>
> > Instance Methods:
> >    close, each, path, pos, pos=, read, rewind, seek, tell
>
> > That's it. I don't even fully understand what all those do. It's
> > treating a Dir as an IO object?
>
> This is wrapping the diropen function from C.  Calling opendir returns a
> DIR* (which is similar to a FILE*).  Individual directory entities can
> be read one at a time with readdir and the rest just modify the position
> indicator.
>
> Reading them all with glob may not always be appropriate.  On very large
> directories (thousands of files), that would be pretty slow and use a
> good chunk of RAM.

I see. That's good to know actually. These are some cases were I could
use this to optimize my code.

> > And there's the problem, what we need are "lazy" File and Dir classes
> > that delegate to the IO ones, that allow us to do everything we need,
> > rather than fussing with all these others.
>
> > I think I'll throw this together. Anyone else interested?
>
> Can you give a mockup of what you're talking about?

I've been working on it today. I post it up tomorrow.

T.