From: ara.t.howard@...
Date: 2007-02-16T11:52:40+09:00
Subject: Re: How to do conditional operator?

On Fri, 16 Feb 2007, joe@via.net wrote:

> If an operator is just syntactic sugar for a message send, how do I
> coose an operator based on an expression evaluation?
>
> For example:
>
> if a
>  s += "text"
> else
>  s = "text"
> end
>
> I should be able to write it something like this:
>
> s ((a)? send("+=") : send("=")) "text"
>
> Except the ruby compiler chokes on the syntax...
>
> Joe

   harp:~ > cat a.rb
   a, s = 42, 'foo'
   s.send( a ? '<<' : 'replace', 'bar' )
   p s

   a, s = false, 'foo'
   s.send( a ? '<<' : 'replace', 'bar' )
   p s


   harp:~ > ruby a.rb
   "foobar"
   "bar"

-a
-- 
we can deny everything, except that we have the possibility of being better.
simply reflect on that.
- the dalai lama