From: Rick DeNatale <rick.denatale@...>
Date: 2006-09-16T01:22:47+09:00
Subject: Re: not finding a breakpoint + values are nil

On 9/14/06, Dan Bensen <randomgeek@cyberspace.net> wrote:
> Ruby seems to be passing over a breakpoint in a class initialize
> function.  "Got grid" is the only break that occurs before the program
> hits a bug.  What is Grid.new doing, and how come the "Grid initialized"
> breakpoint wasn't found or didn't work?
>
> grid after "Got grid":
> => [[nil, nil, nil], [nil, nil, nil], [nil, nil, nil]]
>
> In file controllers/t3_controller.rb:
> ...
>    grid = Grid.new(gridStr)
>    breakpoint "Got grid"
> ...
>
> In file controllers/t3/t3lib.rb:
>
> module Cell
>    class Val < String
>      def isBlank
>        self == BLANK
>      end
>    end
>    BLANK = Val.new(' ')
> end
>
> class Grid < Array
>    def initialize(array = ())
>      super(3) { |row| Array.new(3,Cell::BLANK) }
>      breakpoint "Grid initialized"

Well I'm not sure what else is in your real code, but I just tried
this, and it works. Not that I'm a big fan of subclassing core classes
either:

rick@frodo:/public/rubyscripts$ cat gridtest.rb
require 'rubygems'

require_gem 'ruby-breakpoint'

module Cell
        class Val < String
                def isBlank
                        self == BLANK
                end
        end
        BLANK = Val.new('')
end

class Grid < Array
        def initialize(array=())
                super(3) {|row| Array.new(3, Cell::BLANK)}
                breakpoint "Grid initialized"
        end
end

grid = Grid.new("foo")
breakpoint "Got grid #{grid.inspect}"

rick@frodo:/public/rubyscripts$ ruby gridtest.rb
Executing break point "Grid initialized" at gridtest.rb:17 in `initialize'
irb():001:0> quit
Executing break point "Got grid [[\"\", \"\", \"\"], [\"\", \"\",
\"\"], [\"\", \"\", \"\"]]" at gridtest.rb:22
irb(main):001:0> quit
rick@frodo:/public/rubyscripts$

By the way, what's up with the array=() parameter in initialize?

   1) You don't seem to be using it,
   2) The default value is () which is nil, did you mean []?


-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/