From: dblack@...
Date: 2003-09-30T03:07:40+09:00
Subject: Re: Dir.foreach not with patterns?

Hi --

On Tue, 30 Sep 2003, Paul Duncan wrote:

> * Gavin Sinclair (gsinclair@soyabean.com.au) wrote:
> > On Wednesday, September 24, 2003, 12:33:54 AM, Alan wrote:
> >
> > > ts wrote:
> > >>                 next if f == "." or f == ".."
> >
> > > I did used to do that.  I can't even remember why I changed it to a regexp!
> >
> > Come on, you can't resist.
> >
> >   class Object
> >     def in?(enum)
> >       enum.include?(self)
> >     end
> >   end
> >
> >   ...
> >     next if f.in? [".", ".."]
> >   ...
>
> or
>   next if %w{. ..}.include? f
>
> but personally i prefer this:
>
>   next if f =~ /^\.\.?$/

However....

  $ ruby -e 'File.new("abc\n..\ndef","w")'
  $ ruby -e 'Dir["abc*"].each {|f|
  >  puts "#{f}: yes" if /^\.\.?$/.match(f)}'
  abc
  ..
  def: yes


I know, I know, not likely :-)  Still, /\A\.\.?\z/ would be safer.


David

-- 
David Alan Black
home: dblack@superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav