From: Robert Klemme <shortcutter@...>
Date: 2011-01-05T23:35:38+09:00
Subject: Re: Is singleton class of an object already created?

On Wed, Jan 5, 2011 at 11:24 AM, Adam Prescott <mentionuse@gmail.com> wrote:
> On Tue, Jan 4, 2011 at 9:00 PM, timr <timrandg@gmail.com> wrote:
>
>> class Object
>>  def singleton_class?
>>    self.singleton_methods.length == 0 ? false : true
>>  end
>> end
>>
>
> Really small point here, and not really on topic, but this is a little
> around the houses and can be slightly improved:

I couldn't agree more!  Using ternary operator with "false" and "true"
is not needed most of the time. (Only exception I would concede is to
avoid leakage of references - but then you can as well do "!! expr".)

> class Object
>  def singleton_class?
>    !self.singleton_methods.empty?
>  end
> end
>
> Or just != 0, since it'll return the true/false without the need for a
> ternary.

Or just

class Object
 def singleton_class?
   !singleton_methods.empty?
 end
end

Now we can wonder whether this is worth a method at all... :-)

Kind regards

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/