From: Ed <pyroguy@...>
Date: 2008-02-22T03:29:55+09:00
Subject: Re: Simple array of strings sorting

On Feb 21, 1:14 pm, Andrew Stewart <b...@airbladesoftware.com> wrote:
> On 21 Feb 2008, at 17:55, Ed wrote:
>
>
>
> > Say I have an array of strings that looks like this:
> > test-3
> > test-31
> > test-11
> > test-12
> > test-13
> > test-32
> > test-10
> > test-14
>
> > I want them sorted like so:
> > test-3
> > test-10
> > test-11
> > test-12
> > test-13
> > test-14
> > test-31
> > test-32
>
> > arr.sort doesn't seem to work the way I need. Any help?
>
> It's sorting lexicographically rather than numerically.  Try this
> instead:
>
> arr.sort_by { |x| x.split('-').last.to_i }
>
> In IRB:
>
>  >> arr = %w( test-3 test-31 test-11 test-12 test-13 test-32 test-10
> test-14 )
> => ["test-3", "test-31", "test-11", "test-12", "test-13", "test-32",
> "test-10", "test-14"]
>  >> arr.sort
> => ["test-10", "test-11", "test-12", "test-13", "test-14", "test-3",
> "test-31", "test-32"]
>  >> arr.sort_by { |x| x.split('-').last.to_i }
> => ["test-3", "test-10", "test-11", "test-12", "test-13", "test-14",
> "test-31", "test-32"]
>
> Regards,
> Andy Stewart
>
> -------http://airbladesoftware.com

Works perfectly. Thanks a lot.