From: Marcello Barnaba <bofh@...>
Date: 2007-02-15T14:33:09+09:00
Subject: Re: Drying a ternary condition

Hi,

On Thursday 15 February 2007 06:22, Devin Mullins wrote:
> Marcello Barnaba wrote:
> > klass.send((ARGV[0] || :up).to_sym == :up ? :up : :down)

> klass.send(%w{up down}.find(:up) {|dir| dir == ARGV[0]})
>
> The only way I can think of to get rid of the second 'up' is to
> introduce an abstraction. It provides an additional piece of information
> -- which one's the default. So:

> dirs = %w{up down}
> klass.send(dirs.find(dirs.first) {|dir| dir == ARGV[0] })

clever use of .first (setting the default) and .find.

but I think that readability hit a regression.. and first we stood in front of 
3 ups, now we stand in front of 4 dirs! :)

-- 
pub 1024D/8D2787EF  723C 7CA3 3C19 2ACE  6E20 9CC1 9956 EB3C 8D27 87EF