rexml help posted by Bayard Webb @ Thu, 06 Nov 2008 02:45:29 -0000

Bayard Webb — Thu, 06 Nov 2008 02:45:29 -0000

As luck would have it, the mere act of posting my question resulted in a flash (at least a glimmer) of insight. Closer inspection of the example in the book got me the results I need.

I would still benefit from good sites regarding rexml.

Thanks and sorry for the bother.

rexml help posted by Bayard Webb @ Thu, 06 Nov 2008 01:57:34 -0000

Bayard Webb — Thu, 06 Nov 2008 01:57:34 -0000

Noob warning.

I have a very simple parsing task that could be done with simple line input, but want to “up my game” and use an xml file format and read and write with rexml. The section in the book is brief, and the documentation sparse for a beginner.

I don’t wish to drag this forum down with my lowly example, but am looking for sites that might help me out.

Thanks

changes from 1.8.0 to 1.8.6? posted by stephan Orme @ Fri, 16 May 2008 13:51:00 -0000

stephan Orme — Fri, 16 May 2008 13:51:00 -0000

Hi, I went looking for a changelog and only found the exquisitely detailed programmers change log, not a list of the significant changes. Does this exist? I’m starting to read through version 2.0 of the book and just wanted to read through what might have changed from 1.8.0, what’s covered in the book, to 1.8.6 the current release version, to eliminate some downstream frustration.

Also, any word on when 1.9 will be out and what the significant changes will be?

much obliged,
-s

Nesting Modules in a hierarchy posted by Ahmet Dogramaci @ Fri, 09 May 2008 14:13:27 -0000

Ahmet Dogramaci — Fri, 09 May 2008 14:13:27 -0000

I am coming from Java to Ruby. I actually used Ruby on Rails in one of my client’s projects, but I did not understand it well at the time. Now I am trying to understand the language well so that I can create better and bigger programs.

One of the things that I did not understand well was namespaces and modules. In Programming Ruby it says that modules give you a namespace, but it never mentions that you can actually nest modules to create module hierarchies. Without the nesting, I was thinking you would have a flat namespace and end up with very long module names, or name clashes with the libraries that you use. The nesting actually gives you a facility similar to packages in Java. I think mentioning this in the new version of the book would help programmers.

debugger pickaxe vs vs 186-26 posted by Wes Rishel @ Sun, 09 Dec 2007 06:00:52 -0000

Wes Rishel — Sun, 09 Dec 2007 06:00:52 -0000

The first time I tried to use the debugger was in 186 and I am seeing something different than in v2 of the book on page 163. Or perhaps I am doing something wrong.

In the book it appears that when you run with the debugger option, such as this

ruby.exe -r debug t.rb

you end up with the debugger looking at the source file (e.g., t.rb).

However, when I run it I end up in some Ruby module:

ruby.exe -r debug t.rb
C:/ruby/lib/ruby/site_ruby/1.8/ubygems.rb:10:require ‘rubygems’
(rdb:1) l
[5, 14] in C:/ruby/lib/ruby/site_ruby/1.8/ubygems.rb 5 # All rights reserved. 6 # See LICENSE.txt for permissions. 7 #++ 8 9
=> 10 require ‘rubygems’

The work-around seems pretty simple: set a breakpoint in your own file and type C, as below.

I thought you might want to know, in order to update the book.

(rdb:1) b t.rb:3
Set breakpoint 1 at t.rb:3
(rdb:1) c
Breakpoint 1, toplevel at t.rb:3

class <<Time ? posted by Claude Crider @ Mon, 03 Dec 2007 13:14:12 -0000

Claude Crider — Mon, 03 Dec 2007 13:14:12 -0000

Gamont,

Doesn’t look like you are getting a lot of help. You posted this question over 2 weeks ago and no response. I’m having the same problem. I admit I’m a total idiot and Ruby newbie, but I’ve posted questions to the local Ruby users group with no response.

I keep reading how active the Ruby users community is, but I’m not seeing it.

There don’t seem to be any Prag Prog books on basic Ruby/Rails debugging techniques. The appendices just say to post questions.

I’m getting fairly discouraged.

Good luck!

class <<Time ? posted by Gamont @ Mon, 12 Nov 2007 13:45:08 -0000

Gamont — Mon, 12 Nov 2007 13:45:08 -0000

i find about class <<obj>
but the example file (not that in book) about condition variable shows this inner class:

class <<Time alias old_now now def now old_now.to_f * FACTOR end
end

And running the code Time.now uses this definition.

I would like some explanation how this works.

thanks !