From: Robert Klemme <shortcutter@...>
Date: 2007-06-05T20:10:12+09:00
Subject: Re: How add "Not-match" logic into Enumerable.grep?

On 05.06.2007 11:54, Morgan Cheng wrote:
> Say, I want to get all files in one folder. Since Dir.entries will
> have "." and ".." included. I want to strip them out with "grep". I
> tried to write in such a way as I can did similarly in Perl:
>     log_files = Dir.entries(log_dir).grep(!/^\.\.?/)
> But, it is a syntax error to have "!/regex/" as grep's argument.
> 
> Should I use some trick to make grep accept "not-match" regex?

Use #reject:

Dir.entries(".").reject {|x| /\A\.+\z/ =~ x}

	robert