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• Switching Ruby on Rails databases

  - by Marco

  Hi, I'm starting learning Ruby on Rails. So my application, like every Rails app, has three databases: Development Test Production And the question is: how do i switch from a db to another? Thanks

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• string.split method in ruby behaves funny to me

  - by Steve

  txt = "1aaa5" Then txt.split("a") produces [1, "", "", 5] in ruby 1.9. Anyone can explain why? Particularly, why not [1, 5]? Thanks.

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• how does Enumerable#cycle work? (ruby)

  - by Radek

  looper = (0..3).cycle 20.times { puts looper.next } can I somehow find the next of 3? I mean if I can get .next of any particular element at any given time. Not just display loop that starts with the first element. UPDATE Of course I went though ruby doc before posting my question. But I did not find answer there ...

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• url validation in ruby on rails

  - by jpallavi

  1)Url field should also accept url as “www.abc.com”. If user enters url like this, it should be automatically appended with “http://” resulting in value saved in database as “http://www.abc.com”. If user enters url as “http://www.xyz.com” system should not append “http://”. User should be able to save url with “https://”. what is the code for it in ruby on rails?

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• Get methods params type parsing wsdl file in a rails/ruby application

  - by Marco Sangiorgi

  Hi, I have a question about ruby and wsdl soap. I couldn't find a way to get each method's params and their type. For example, if I found out that a soap has a methods called "get_user_information" (using wsdlDriver) is there a way to know if this method requires some params and what type of params does it require (int, string, complex type, ecc..)? I'd like to be able to build html forms from a remote wsdl for each method... Sorry for my horrible English :D

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• Getting a user country name from originating IP address with Ruby on Rails

  - by TK

  I want to extract a user country name from visitors' IP addresses. I could get the IP address with remote_ip. But what could be the easiest way to get the country name? It doesn't have to be super accurate. Any ruby library (gem or plugin) to do this? I want an simple and easy solution for this.

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• Ruby weird assignment behaviour

  - by jaycode

  Is this a ruby bug? target_url_to_edit = target_url if target_url_to_edit.include?("http://") target_url_to_edit["http://"] = "" end logger.debug "target url is now #{target_url}" This returns target_url without http://

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• Nasty things user supplied ruby code in server can do

  - by nijikunai

  I'd like to run user supplied ruby code in server, what are the potentially nasty things that can happen? I mean things like deleting files etc. Can you give me more examples? Thanks in advance!

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• JRuby-friendly method for parallel-testing Ruby on Rails app

  - by Toby Hede

  I am looking for a system to parallelise my tests in a Ruby on Rails app (using rspec, cucumber) that works using JRuby. The systems I can find (hydra, parallel-test) look like they use forking, which is problematic in a JRuby environment.

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• Ruby bindings for Qt gui application.

  - by exvion

  How to create a Qt GUI applications with the ability to access it from the ruby script. Example: require 'myQt' myapp=myQt.new myapp.startQtGuiApp myapp.setValue('TextField1',45) value=myapp.getValue('TextField2')

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• Restrictons of Python compared to Ruby: lambda's

  - by Shyam

  Hi, I was going over some pages from WikiVS, that I quote from: because lambdas in Python are restricted to expressions and cannot contain statements I would like to know what would be a good example (or more) where this restriction would be, preferably compared to the Ruby language. Thank you for your answers, comments and feedback!

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• Ruby: execute a binary file in memory?

  - by John

  Is it possible to read binary in ruby file and execute it directly in memory? for example something like this: x = IO.read('/bin/ls') execute(x) I tried system(x) but it doesn't work ArgumentError: string contains null byte

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• Why are Ruby projects so dominant at Github?

  - by timepilot

  Ruby is the most popular language at Github by far. Compare that with the questions at Stack Overflow or the TIOBE index. What is the reason for this difference in relative popularity in different places?

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• What's the __repr__ equivalence in ruby?

  - by prosseek

  The repr function is fancy as it is called when print OBJECT is used automatically? Is there a ruby equivalence for it? I thought it was to_s, but, I had p OBJECT doesn't seem to call the to_s method.

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• how to implement gmail client with ruby-on-rails

  - by poseid

  Hello, how would I develop an Email client in Ruby-on-rails taking Gmail as an example? I would be especially interested in the send email functions Thanks for any pointers

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• Automatically download files in Ruby

  - by Obinna

  I'm trying to write a ruby script which automatically downloads some files from some server ever 30-45 minutes (to prevent overload) as long as my computer is turned on. It's possible that my computer might be turned off at some point, but the download should resume (probably re-download the current file). I already have the file list but I can't figure out how to make such a script to run autonomously. What are some ways I can do this?

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• Writing a file shredder in python or ruby?

  - by pmilb21

  In the effort to learn python and/or ruby, I was wondering how a file shredder would be implemented? I would like it to take in a file as an argument and then employ an algorithm to make that file unrecoverable. Would possibly add the support for multiple files or even whole directories later.

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• convert Ruby to C languge

  - by alaamh

  I have seen this sample written in Ruby code, how i can simulate it in C language? Open3.popen3(command) do |stdin, stdout, stderr| @stop_stdin = stdin while !stdout.eof do output = stdout.read(1024 * 100) list_pipes.each do |out| out.print output end end end

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• Good books on Ruby based DSL

  - by nijikunai

  I'm trying to create a DSL in ruby, can you suggest me some good books? I looked around amazon and safari but so far couldn't find any. Thanks in advance!

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• Ruby on rails list to columns

  - by Ignas Rytoj

  How to create ruby on rails list(index page) like this: 1 | 2 | 3 4 | 5 | 6 7 | 8 | 9 10| 11| and so on.

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• Handling of 'or' condidions in Ruby vs PHP

  - by Adam

  I'm not sure what to call this, so I'll give an example. In PHP 1==2 || 2 returns 1 or true In Ruby 1==2 || 2 returns 2 (The second statement if the first evaluates to false). Is there any short way to implement similar thing in PHP?

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• Ruby on rails multiple apps hosting (name server)- configuration question

  - by Sanjay

  I am looking to host multiple ruby on rails apps and want to use lighttpd or nginx.How do I do multiple name server configuration. ? I know how to do it in apache through webmin control panel.But trying to move away from apache here

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• Tools for development SOAP-service on Ruby 1.9

  - by aaz

  Which set of libraries and tools would you recommend to use for development SOAP-service on Ruby 1.9 - soap-tools, web-servers, or maybe a web-framework?

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• Ruby library not found (no such file to load)

  - by Jeremy Gillick

  I manually placed a library in the library directory (/usr/local/lib/ruby/site_ruby/1.8) and when I try to require it, it says "no such file to load". I used "$:.first" to get the library path, so why wont it work? Is there any good way to debug this? Thanks

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• Anything like bpython for Ruby?

  - by macek

  IRb is pretty plain compared to bpython, even when using wirble. Is there any ruby equivalent of bpython?

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