From: Robert Klemme <shortcutter@...>
Date: 2007-07-26T20:20:56+09:00
Subject: Re: List of directory.

2007/7/26, Marcin Tyman <m.tyman@interia.pl>:
> Robert Klemme wrote:
> > 2007/7/26, Marcin Tyman <m.tyman@interia.pl>:
> >>
> >> a20
> > Apparently you want to _sort by_ the numeric part.  You can extract it
> > with a regular expression like this:
> >
> > irb(main):017:0> a.sort_by {|x| x[/\d+/].to_i }
> > => ["a1", "a2", "a10", "a20"]
> >
> > Kind regards
> >
> > robert
>
>
> I've done it as follows:
>
> arrOfFiles.sort! do |file1, file2|
>
>   f1 = file1.slice(/\d+.sql/)
>   f1 = f1.slice(/\d+/)
>
>   f2 = file2.slice(/\d+.sql/)
>   f2 = f2.slice(/\d+/)
>
>
>   f1.to_i <=> f2.to_i
> end

Well, if you want to sort in place you could do

irb(main):003:0> %w{a10 a1 a2 a20}.sort! {|*a| a.map{|x|
x[/\d+/].to_i}.inject {|a,b| a<=>b}}
=> ["a1", "a2", "a10", "a20"]

Um, not very readably I guess.

:-)))

Kind regards

robert