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• How to debug Ruby base methods in Netbeans ?

  - by Bragaadeesh

  Hi, I am able to debug my ruby program. At times, I would want to go inside the library methods and see what is happening. How to achieve it in Ruby. For example, [ 3, 1, 7, 0 ].sort i would want to go inside the sort method and see how that works lively. In Java+Eclipse this is possible, all I have to do is to attach the source of Foundation…

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• ruby c extensions: character values over 127

  - by Adrian

  I am trying to make a C extension for Ruby that includes a method returning a string, which will sometimes have character values that need to be in an unsigned char. In http://github.com/shyouhei/ruby/blob/trunk/README.EXT, all of the functions listed for turning C strings into Ruby strings take signed chars. So I couldn't do this: unsigned char…

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• Ruby switch like idiom

  - by Eef

  Hey, I have recently started a project in Ruby on Rails. I used to do all my projects before in Python but decided to give Ruby a shot. In the projects I wrote in Python I used a nice little technique explained by the correct answer in this post: http://stackoverflow.com/questions/277965/dictionary-or-if-statements-jython I use this…

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• more ruby way of doing project euler #2

  - by aharon

  I'm trying to learn Ruby, and am going through some of the Project Euler problems. I solved two as such: def fib(n) return n if n < 2 vals = [0, 1] n.times do vals.push(vals[-1]+vals[-2]) end return vals.last end i = 1 s = 0 while((v = fib(i)) < 4_000_000) s+=v if v%2==0 i+=1 end puts s While that works, it…

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• Reference book on Ruby on Rails social network site for novices

  - by Christopher

  Hey, so I am a novice programmer who has only worked with HTML, CSS, and a touch of Java a couple of years ago. I am looking to try to get a social network site up and running on Ruby on Rails and was looking at RailsSpace: Building a Social Networking Website with Ruby on Rails (Addison-Wesley Professional Ruby Series) - Paperback…

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• Querying Active Directory in ruby app on Windows box

  - by Ben

  I have a small ruby app in which I'm trying to query some information from Active Directory. The app will be run by a Windows user who is already logged in. It looks like the ruby-net-ldap gem wants me to connect to an LDAP server using an IP address, port and then pass my username and password. Is there a way to achieve this…

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• Storing cvs data for further manipulation using Ruby

  - by ischnura

  I am dealing with a csv file that has some customer information (email, name, address, amount, [shopping_list: item 1, item 2]). I would like work with the data and produce some labels for printing... as well as to gather some extra information (total amounts, total items 1...) My main concern is to find the appropriate…

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• The State of RDF in Ruby

  - by Daniel

  I'm wondering about the current support there is in Ruby for semantic web technologies. Is there good RDF options? It seems that the last surveys done were circa 2007 ( http://paul-classic.stadig.name/2007/10/26/the-state-of-rdf-support-in-ruby-2007/ ). Is Redland's RDF wrappers the best way to go for RDF support - all…

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• best IDE for ruby on rails

  - by Sanjay

  Having moved from java to ruby, I am struggling to find a good IDE for ruby. I used eclipse on java, so I tried Aptana Studio (previously Radrails), but its not even half as good. Currently I am trying out Netbeans for Ruby. Please suggest me the best RoR IDE out there. I believe TextMate is universally accepted as the…

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• Creating Ruby applications for Windows.

  - by Omega

  I want to develop a Windows application. Honestly I care little about cross-platforms for now (but still would be good) I want to use Ruby, since it has quite a simple syntax and is so.. well, simple and easy to learn. My application is like a "game level creator", where you can design your own level and then run it…

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• Having difficulty catching postgresql exception in sequel/ruby

  - by mhd

  I have postgresql table that has somekind of unique constraint. I have ruby script that will update this table. The ruby script should be able to switch to UPDATE instead of INSERT when this kind of error occured: PGError: ERROR: duplicate key value violates unique constraint CMIIW, sequel seems cannot catch this…

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• Running a Ruby interpreter on iPad

  - by slothbear

  I'll be taking a trip soon with my iPad, without my laptop. I'd like to continue to tinker with Ruby while I'm on the road. I have an iPhone developer program membership, and I'm not interested in submitting this stuff to the app store. I found the shinycocos project, which appears to embed a Ruby interpreter in…

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• c struct map to ruby using SWIG

  - by pierr

  Hi, Is there any body can confirm the description here is true? My experience is that I can not use Example::Vector.new at all. C/C++ structs are wrapped as Ruby classes, with accessor methods (i.e. "getters" and "setters") for all of the struct members. For example, this struct declaration: struct…

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• make Ruby script run once a second

  - by Matt Hintzke

  I have a ruby script that needs to run about 1 time a second. What I am doing is using a ruby script to keep track of modifications of files in a directory. I want the script to run once a second so that the modifications are updated in "live" time. Basically, I want my script to do the same kind of thing as…

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• What does :this means in Ruby on Rails?

  - by Marco

  Hi, I'm new to the Ruby and Ruby on Rails world. I've read some guides, but i've some trouble with the following syntax. I think that the usage of :condition syntax is used in Ruby to define a class attribute with some kind of accessor, like: class Sample attr_accessor :condition end that implicitly…

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• Errors when using a Ruby On Rails scaffold with a data type of interger

  - by bublebboy

  I am learning Ruby On Rails. I am on a shared hosting with Ruby version 1.8.1 and Rails version 2.3.10. I am working my way through a tutorial at http://railstutorial.org/chapters/a-demo-app?version=2.3#top and at one point in the tutorial it has me run: script/generate scaffold Micropost content:string…

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• Declaring an integer Range with step != 1 in Ruby

  - by Dan Tao

  Hey guys, I'm completely new to Ruby, so be gentle. Say I want to iterate over the range of even numbers from 2 to 100; how would I do that? Obviously I could do: (2..100).each do |x| if x % 2 == 0 # my code end end But, obviously (again), that would be pretty stupid. I know I could…

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• Double "!!" in Ruby [closed]

  - by Alex Maslakov

  Possible Duplicate: What does !! mean in ruby? Ruby, !! operator (a/k/a the double-bang) Sometimes I see a Ruby code like this def sent? !!@sent_at end It seems to be not logical. Is it necessary to use here double !? As far as I'm concerned, it might be just def sent? @sent_at end …

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• How to install libv8 using a specific version of g++?

  - by Catfish

  I'm trying to install therubyracer gem for a rails project - http://stackoverflow.com/questions/13793533/unable-to-install-therubyracer-on-centos-errors-with-v8-and-gcc and i'm thinking that now that i installed g++44, that all i need to do is get gem install libv8 to use g++44 instead of g++. Is…

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• Mainstream Linux on 1GB HDD

  - by Ariel Nundi

  Hi, I've decided to start learning Linux + Ryby + RoR. The problem is the only personal computer I have is a laptop with 1GB flash card and I can't afford to buy more hardware right now. The laptop has dual core CPU and 2GB of RAM. Can you recommend a Linux distribution I can install? I've tried…

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• I am trying to set up a ubuntu sever 12.04 on my machine [migrated]

  - by Jseb

  I am trying to set up a server on my home network which will eventually host rails. I am not great in linux server and i try to follow the prompt. I did succesfully get to a black screen which then prompts me to a username then password to then do anything ( assuming). However here what i try to…

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• Run Rails 3 app on a Rails 2 server/machine?

  - by chucknelson

  I'm trying to run a Rail 3 (3.0.10) app on a shared joyent smartmachine server (I don't have root access) which has Rails 2 (2.3.11) installed , and I'm not sure what to do after I freeze my Rails 3 app with bundle install --deployment. It seems like with the Rails 3 and bundler gems not being…

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• Two threads in a rails initializer file seems to not run them properly

  - by Luccas

  Initially I was using one thread to listen a queue from amazon and works perfectly. aws.rb Thread.new do queue1 = AWS::SQS::Queue.new(SQSADDR['my_queue']) queue1.poll do |msg| ... but now I appended another thread to listen another queue: ... Thread.new do queue2 =…

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• What happens when Phusion PassengerMaxPoolSize is reached?

  - by bmurtagh

  The subject of my post pretty much sums up my question: What happens when PassengerMaxPoolSize is reached? For Example: PassengerMaxPoolSize is configured to 40 based off our system specs What happens if all 40 sessions are active (processing a request) and our load balancer passes…

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• Cerification for Rails?

  - by Salil

  I have passed SCJP 1.5 for JAVA 3 years back it hepls me to clear BASICS of the JAVA and OOPS. I would like to know if there is any certification exam conducted for the Ruby or Ruby on Rails.providing url details will be more helpful.

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