From: Daniel Carrera <dcarrera@...>
Date: 2003-01-12T22:23:34+09:00
Subject: Spelling correction: [ was Re: sorting with the Swartzian transform]

I misspelled Randal's name.   It's should have been "Schwartzian
transformed" as it is named after "Randal Schwartz".

David, thanks for pointing that out.

In my defense, I did look up his name before writing the email.  The page
I found with his name had it spelled wrong.

Cheers,
Daniel Carrera
Graduate Teaching Assistant.  Math Dept.
University of Maryland.  (301) 405-5137

On Sun, 12 Jan 2003, WATANABE Hirofumi wrote:

> Hi,
>
> Daniel Carrera <dcarrera@math.umd.edu> writes:
>
> > This email is simply for the benefit and/or reading pleasure of ruby
> > hackers.  In particular those without a strong Perl background.  I just
> > had to do a Swartzian transform in Ruby and it occurred to me that someone
> > might benefit from my experience.
>
> Ruby 1.8 has Enumerable#sort_by.
> This method is equivalent to:
>
>   module Enumerable
>     def sort_by
>       ary = map { |i| [yield(i), i] }
>       ary.sort! { |a, b| a[0] <=> b[0] }
>       ary.map! { |i| i[1] }
>     end
>   end
>
> --
> eban
>
>