From: kjana@...4lab.to (YANAGAWA Kazuhisa)
Date: 2002-08-10T11:45:33+09:00
Subject: Re: nil || //

In message <20020809125049.N11837@atdesk.com>
pbrannan@atdesk.com writes:

> Why does this not work in Ruby 1.6:
> 
> [pbrannan@zaphod scripts]$ ruby -v -e 'p nil || //'
> ruby 1.6.7 (2002-03-01) [i686-linux]
> nil
> [pbrannan@zaphod scripts]$ ruby-1.7 -v -e 'p nil || //'
> ruby 1.7.2 (2002-07-13) [i686-linux]
> //

No, it works, but completely different way.

    > ruby-1.6 -e '$_ = ""; p nil || //' 
    0
    > ruby -e '$_ = ""; p nil || //'         
    //

Namely 1.6.x treats Regexps in every conditional as implicit matching
to $_, whereas 1.7.x stops this special treatment because of an
argument almost same to yours.

The magic remains for such as `break if /^\s*$/' construct, read the
code for more exact information :-)


-- 
kjana@dm4lab.to                                August 10, 2002
Time is illusion, life is confusion.