From: dblack@...
Date: 2002-11-27T04:32:55+09:00
Subject: Re: Default value of property

Hi --

On Wed, 27 Nov 2002, Mauricio [iso-8859-1] Fern�ndez wrote:

> On Tue, Nov 26, 2002 at 10:44:50AM +0900, ahoward wrote:
> > On Tue, 26 Nov 2002, Tim Bates wrote:
> >
> > [snip]
> > T> if object.property
> > T> 	object.property.method
> > T> else
> > T> 	default_value
> > T> end
> > [snip]
> >
> > how about
> >
> >   object.property and object.property.method or default_value
> >
> > you could do something like
> >
> >   object.property.method rescue default_value
> >
> > but this does not catch NameError, unless someone else knows the syntax for
> > this?
>
> What's wrong about '? :' ?
>
> irb(main):001:0> b = nil
> nil
> irb(main):002:0> (__f=b)?__f.meth : nil

Or:

  b.meth if b

(if I'm understanding this part of the discussion correctly...)


David

-- 
David Alan Black
home: dblack@candle.superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav