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• ruby on rails setup on my ubuntu

  - by hiren

  Do I need to set up virtual hosts as mentioned here: http://wiki.rubyonrails.org/deployment/apache-passenger I am just setting up dev env on my own machine to try and learn ruby on rails. thanks in advance.

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• Embedding tcl in ruby

  - by Jordan

  Is there any way to do this? It seems the only possible way to do this is by using ruby/tk and creating a tcl interpreter through that api. However, I'd like to use this on a system with no GUI (x windows). Am I out of options? Thanks

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• 256 color terminal library for Ruby?

  - by brianegge

  Is there a gem like 'Term::ANSIColor' which works with 256 color terminals? The perl script 256colors2.pl works great in my terminal, and I'd like to use some of these colors in my ruby scripts without manually inserting the ANSI codes.

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• Using ruby's OptionParser to parse sub-commands

  - by rampion

  I'd like to be able to use ruby's OptionParser to parse sub-commands of the form COMMAND [GLOBAL FLAGS] [SUB-COMMAND [SUB-COMMAND FLAGS]] like: git branch -a gem list foo I know I could switch to a different option parser library (like Trollop), but I'm interested in learning how to do this from within OptionParser, since I'd like to learn the library better. Any tips?

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• ruby on rails - ultrasphinx

  - by satya

  Ruby on Rails - UltraSphinx Hi guys, I'm using Ultrasphinx for the search thing. My question is : I have the "rake ultrasphinx:daemon:start" running in the background. Now, should I have a cron job that does "rake ultrasphinx:index" regularly or will the daemon take care of indexing whenever a new object is created. Please, let me know. Its kind of emergency. Thanks

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• Ruby SerialPorts

  - by Seth Archer

  I'm using the ruby serial port gem. After I open up the port I send the data I want like this. sp.write [200.chr, 30.chr, 7.chr, 5.chr, 1.chr, 2.chr, 0.chr, 245.chr].to_s It doesn't work, but if I put it in a loop of around 200 times: 200.times do sp.write [200.chr, 30.chr, 7.chr, 5.chr, 1.chr, 2.chr, 0.chr, 245.chr].to_s end It works. Any ideas on why this is happening?

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• XMLRPC with long integer entry in hashMap from java server is not obtained in ruby client

  - by Mahesh M

  I am using XMLRPC to get data from a Java server. I use HashMap as return value for a particular remote call. The server puts a long int into the HashMap (which is returned) along with other data. At the client end, which is ruby, I get all other data but for the long int. How can I get this data at the client?

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• How to know when an instance variable gets set in Ruby

  - by Brian Genisio

  Is there any way to override the setting of instance variables in Ruby? Lets say I set an instance variable: @foo = "bar" Can I intercept that and do something (like record it or puts, for instance)

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• Ruby SOAP::RPC::Driver seeing the generated soap request

  - by ssmithstone

  I'm using ruby's WSDLFactory to create an rpc driver to access the paypoint soap service and i need to see what xml request is being generated is there a way to do this code or should i try and use something like ethereal

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• Ruby on Rails - jrails not site wide

  - by Hamish

  Is it possible to configure jrails so that it only replaces the ruby on rails helper methods for some parts of the site? I am currently in a project where we are doing a staggered migration to jQuery so the site wide choice is not an option in this case.

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• Editor Ruby and RoR on Ubuntu 9.10

  - by Anry

  I'm starting to program in Ruby and Rails. Which editor is best to use? My OS is Ubuntu 9.10.

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• Using ASP.NET c# with Sketchup Ruby Extension

  - by Tad Carter

  I'm an ASP.NET c# developer using VS2010 as my development platform. I am interested in accessing Sketchup models using a web form interface. Has anyone done this? I am looking for a simple "Hellow World" web application that uses the Ruby Extension model.

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• Ruby program with the largest ratio of output length to program length

  - by Horace Loeb

  The program print "hi" contains 10 characters and outputs a string with length 2. Therefore its ratio of output length to program length is 2/10. My question is what Ruby program has the largest output length to program length ratio (For program length let's only count non-whitespace characters (i.e., it's easy to minify a program))

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• ruby write newline character to file but do not interpret as a true newline

  - by thomas

  I am trying to write a ruby string to a file in such a way that any newline characters embedded in the string remain embedded. This is being written out to a file which will then be processed by another tool. An example is below. I want this: 1 [label="this is a\ntest"] \n (second \n is a true newline) I have tried this: string = '1 [label="this is a\ntest"]' + "\n" Any thoughts?

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• Getting output of system() calls in ruby

  - by Macha

  If I call a command using system() in ruby, how do I get it's output? e.g. system("ls")

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• Making Environment Changes Stick in Ruby Scripting

  - by yar

  Here is my script #!/usr/bin/env ruby if __FILE__ == $0 `cd ..` end which runs fine, but when it exits, I'm back where I started. How can I "export" the changes I've made to the environment?

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• Hibernate CRUD à la Ruby on Rails' Scaffolding

  - by schonarth

  Guys, Do you know of any tool that would do like Ruby on Rails' Scaffolding (create simple CRUD pages for any particular class to allow quickly populating a database with dummy data), only which used Java classes with Hibernate for database access, and JSP/JSF for the pages? It is a drag when you are programming one part of an application, but need data that can only be added with another part that is not ready yet, or very cumbersomely by directly inserting it into the DB.

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• Running Java, Python, Ruby and Perl programs in .NET

  - by Arjun Vasudevan

  I've .NET framework 3.5 installed in my laptop. Just .NET alone, no Visual Studio. How can I run Java, Python, Ruby and Perl programs from the console? What are the commands used for running them? Do I need to install something else also, for running these language files?

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• Ruby: opening files relative to home directory

  - by Peter

  In Ruby, the following fails with Errno::ENOENT: No such file or directory, even if the file exists: open('~/some_file') However, you can do this: open(File.expand_path('~/some_file')) Two questions: Why doesn't open process the tilde as pointing to the home directory? Is there a slicker way than using File.expand_path?

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• remainder application in ruby

  - by nani

  i want to send develop a web app in ruby on rails . which wil send the remainder to the mail and mobile tooo . can some body help me out thanks in advance

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• accept_nested_attributes_for in Rails 2.3.5 and Ruby 1.9.1

  - by jaycode

  Has accept_nested_attributes_for already works with Rails 2.3.5 and Ruby 1.9.1???? I keep getting this error undefined method accept_nested_attributes_for' for #<Class:0x00000108da2140>

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• Parsing a UTF-16 encoded xml file in ruby

  - by Matthew Toohey

  Hello I've been trying to parse a UTF-16 encoded xml file in Ruby (1.8.7), and I can't seem to find how to do it by searching (google and stack overflow) Here's the xml file url: http://www.abc.net.au/triplej/feeds/playout/triplejsydneyplayout.xml?_5366 Getting the xml string from Net::HTTP and passing it to REXML, then calling logger.info xmlDoc.inspect produces: <UNDEFINED> ... </> Any ideas? Cheers

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• Error in rounding off values using .round in Ruby

  - by Shreyas Satish

  The following piece of code works perfectly in script/console but returns the following error when i compile the same in a ruby script.: :in `round': wrong number of arguments (1 for 0) (ArgumentError) tf={"ph"={0=1.33333333333333, 1=1.5}, "fee"={0=1.66666666666667}, "test"={0=1.16666666666667, 1=1.25}, "what"={0=2.0, 1=2.0}, "for"={0=1.5}, "is"={0=1.83333333333333, 1=1.75}} tf.each{|k,v| v.each{|k1,v1| tf[k][k1]=(v1.round(5))}} Any Ideas ? Cheers !

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• Ruby: Continue a loop after catching an exception

  - by Santa

  Basically, I want to do something like this (in Python, or similar imperative languages): for i in xrange(1, 5): try: do_something_that_might_raise_exceptions(i) except: continue # continue the loop at i = i + 1 How do I do this in Ruby? I know there are the redo and retry keywords, but they seem to re-execute the "try" block, instead of continuing the loop: for i in 1..5 begin do_something_that_might_raise_exceptions(i) rescue retry # do_something_* again, with same i end end

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• Ruby Exception or Error?

  - by Ell

  I have noticed that in the Ruby exception hierarchy, there are "errors" such as ArgumentError and there are "exceptions" such as SignalException. Is there a certain practise of naming exceptions? thanks in advance, ell.

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