From: Michael Neumann <neumann@...>
Date: 2001-08-08T02:23:27+09:00
Subject: [ruby-talk:19300] Re: Speaking of the ternary operator....

David Tillman wrote:
> 
> 
> >>>>> David Alan Black <dblack@candle.superlink.net> writes:
> 
> > I seem to remember at one point someone saying that the ternary
> > operator might be vanishing from Ruby at some point.  It may
> > have been over on irc, or in my fevered imagination.  I'm not
> > sure.
> 
> > Personally I wouldn't miss it, though that's neither here nor
> > there.  I'm just curious about it.
> 
> 
> > David
> 
> > -- David Alan Black home: dblack@candle.superlink.net work:
> > blackdav@shu.edu Web: http://pirate.shu.edu/~blackdav
> 
> 
> 
>   It isn't very pretty.  However; I do use it quite a bit
>   to save many lines of if/then/else/end: 
> 
>     @border = args[1].include?(H_border) ? args[1][H_border] : 0
>     @align = args[1].include?(H_align) ? args[1][H_align] : false
>     @spacing = args[1].include?(H_spacing) ? args[1][H_spacing] : false
>     @padding = args[1].include?(H_padding) ? args[1][H_padding] : false
>     @width = args[1].include?(H_width) ? args[1][H_width] : false
>     @bgcolor = args[1].include?(H_bgcolor) ? args[1][H_bgcolor] : false
>     @bcolor = args[1].include?(H_bcolor) ? args[1][H_bcolor] : false
>     @bclight = args[1].include?(H_bclight) ? args[1][H_bclight] : false
>     @bcdark = args[1].include?(H_bcdark) ? args[1][H_bcdark] : false
>     @center = args[1].include?(H_center) ? args[1][H_center] : false
>     @format = args[1].include?(H_format) ? args[1][H_format] : []


      Try Hash#fetch(key, default):

      x = args[1]
      @border = x.fetch(H_border, 0)
      @align  = x.fetch(H_align, false)

      ...


      Even shorter than Scheme.


Regards,

  Michael

-- 
Michael Neumann
merlin.zwo InfoDesign GmbH
http://www.merlin-zwo.de