From: Todd Benson <caduceass@...>
Date: 2008-02-22T03:41:01+09:00
Subject: Re: Simple array of strings sorting

On Thu, Feb 21, 2008 at 12:20 PM, Ed <pyroguy@gmail.com> wrote:
>
> On Feb 21, 1:06 pm, William James <w_a_x_...@yahoo.com> wrote:
>  > On Feb 21, 11:54 am, Ed <pyro...@gmail.com> 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?
>  > > Thanks
>  >
>  > The sequences of numerals need to be treated as numbers,
>  > not strings.
>  >
>  > " test-3
>  > test-31
>  > test-11
>  > test-12
>  > test-13
>  > test-32
>  > test-10
>  > test-14 ".split.sort_by{|s| s[/\d+/].to_i}
>  >     ==>["test-3", "test-10", "test-11", "test-12", "test-13",
>  > "test-14", "test-31", "test-32"]
>
>  Thanks for the response.
>  arr.split.sort_by{ |s| s[/\d+/].to_i }  produces this error message:
>  "can't convert Regexp into Integer"

William was splitting the string as an example, not an array.  Try...

arr.sort_by { |s| s[/\d+/].to_i }

... if you trust your data (i.e. you don't accidentally have numbers
hanging out elsewhere, like test1-41)

Todd