From: Wayne Scott <wscott@...>
Date: 2001-05-18T00:40:06+09:00
Subject: [ruby-talk:15329] Re: Pluggable sorting - How would you do it?

From: Dave Thomas <Dave@PragmaticProgrammer.com>
> The example in http://www.rubycentral.com/book/ref_c_numeric.html#nonzero_qm
> shows a slightly more idiomatic form:
> 
>   tbl.sort {|a,b| (b[0] <=> a[0].nonzero? || b[1] <=> a[1] }
				  ^^ missing ) here	    

> 
> This turns out to be exactly the same number of characters as the Perl
> version (give or take :)

Yes that is a little better.  My years of C and Perl cause me to be
bitten by the "0 is true" thing occasionally.  But it is the right
thing for Ruby.

> 
> Of course, if tbl consists of 2 element arrays, you could also just
> write
> 
>    tbl.sort.reverse

Actually in my example it has the first field in reverse order and the
second field forward...

Thanks, 

-Wayne