From: Bertram Scharpf <lists@...>
Date: 2009-10-26T21:40:44+09:00
Subject: Re: Array Number of Leaves

Hi,

Am Montag, 26. Okt 2009, 21:17:17 +0900 schrieb Robert Klemme:
> 2009/10/26 salai <sayakyi@gmail.com>:
> >    self.inject(0){|acc,x|
> >        if x.kind_of?(Array)
> >          acc += x.number_of_leaves
> >        else
> >          acc += x
> 
> The line above should read acc += 1.  You could even simplify that as
> 
> acc += (x.number_of_leaves rescue 1)
> 
> >        end
> >      }

I prefer doing it with `case'. I admit I did no performance check.

  inject( 0) { |acc,x|
    acc += case x
      when Array then   x.number_of_leaves
      else              1
    end
  }

Bertram

-- 
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de