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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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• 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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• 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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• 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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• 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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• Can I generate a ruby on rails database migration file from a MySQL sql file

  - by PlanetMaster

  Hi, I have a sql script file that upon import creates a table in a MySQL database and fills it with 2800 record. These are all the postal codes for the country Belgium. Now I would like to make a Ruby on Rails database migration file from this. Any idea how I can do this? Thanks, Michael

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• Detecting OS X camera with Ruby

  - by Anon39393939

  I'd know how to do this with AS3, but ruby search turns up nothing. Any help please.

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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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• 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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• Best practices for handling binary data in Ruby?

  - by StackedCrooked

  What are the best practices for reading and writing binary data in Ruby? In the code sample below I needed to send a binary file using over HTTP (as POST data): f = File.new("resp.der", "r") # binary file begin while true out.syswrite(f.sysread(1)) # out is an output stream (type IO) end rescue EOFError => err puts "Sent response." end While this code seems to do a good job, it probably isn't very idiomatic. How can I improve it?

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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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• Ruby javascript unescape equivalent

  - by vise

  I want to unescape the following string: '\u00020\u0002Standard\u00023\u0002Doe John\u000169\u0002\u0010\u0002Lorem\u0002\u0011\u0002Ipsum\u0002\u0014\u0002' Javascripts unescape function works ok, however how can I unescape it in ruby? Take in mind that unescape(previousString) is 0Standard3Doe John69LoremIpsum.

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• Audio processing libraries for Ruby?

  - by J. Pablo Fernández

  Any recommendation on libraries to do audio processing in Ruby. I need to do the following two tasks: Find silences, for which I'm happy to just be able to iterate over each sample in the wave. Cut and paste pieces of wav files to form a new wav file. Convert wav to mp3, which I will probably leave to lame anyway. I'm looking for the equivalent of NAudio, a C# library.

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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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• How to call cgi script from ruby

  - by Maddy

  Hello, I've a remote cgi script hosted on Apache using SSL. It takes in two input variables a and b. I want to call call the cgi script with right input variables using ruby. Any clues would be appreciated.

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• Ruby NTLM Library

  - by Scott Watermasysk

  Anyone have a good NTLM library recommend for Ruby? There is http://rubyforge.org/projects/rubyntlm/ but it has not been touched in quite a while.

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• Is there a ruby equivalent of "python -i"?

  - by Steven

  ruby -n is the closest thing I found, but it repeats the whole script. Also it's not available for irb.

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• Determining whether one array contains the contents of another array in ruby

  - by Andrew Grimm

  In ruby, how do I test that one array not only has the elements of another array, but contain them in that particular order? correct_combination = [1, 2, 3, 4, 5] [1, 5, 8, 2, 3, 4, 5].function_name(correct_combination) # => false [8, 10, 1, 2, 3, 4, 5, 9].function_name(correct_combination) # => true I tried using include, but that is used to test whether [1,2,3].include?(2) is true or not.

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• First step in Ruby on Rails

  - by ungalnanban

  Hi.. I am going to learn Ruby on Rails (ROR) , can any one help me how to write a "hello world" program and How can I run the program.

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• Methods in Ruby: objects or not?

  - by Mladen Jablanovic

  Inspired by this discussion, after some googling I wasn't able to find an answer to a pretty simple question regarding methods in Ruby: are they objects or not? There are different opinions here and there, and I would really like to hear, let's say, an in-depth explanation. I'm aware of Object#method method, which takes a method name and returns a Method instance, but, on the other hand, there's a similar thing you can do with blocks to make them into Proc instances, and blocks aren't objects, so what makes methods any different?

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• ruby on rails photo upload problem

  - by dodo00700

  Hallo rails version 2.3.5 I'm learning rails and I run into a problem. I'm doing some nesting forms from the railscasts tutorials. I changed the text area into a data field to upload photos and everything is working. Now i have to display the uploaded pictures and i simply can't do it. I Tried everything I could find on the net but nothing worked. PROBLEM I have the Article controller which handles the article CRUD. inside the article new form there is nested a form for uploading images. article controller def code_image @image_data = Photo.find(params[:id]) @image = @image_data.binary_data send_data(@image, :type => @image_data.content_type, :filename => @image_data.filename, :disposition => 'inline') end photo model def image_file=(input_data) self.filename = input_data.original_filename self.content_type = input_data.content_type.chomp self.binary_data = input_data.read end articles/show.html.erb <%=h @article.title %> <%=h @article.body %> <% for photos in @article.photos %> <%= image_tag(url_for({:action => 'code_image', :id => @article.photos.id})) -%> <% end %> articles/_formnew.html.erb <% form_for (:article, @article, :url => {:action=>'create'}, :html=> {:multipart=>true}) do |f| %> <%= f.error_messages % <%= f.label :title %><br /> <%= f.text_field :title %><br /><br /> <%= f.label :body %><br /> <%= f.text_area :body, :style => 'width: 600px;' %><br /><br /> <% f.fields_for :photos do |builder|%> <%= builder.label :content, "Photo"%><br /> <%= builder.file_field :image_file %><br /> <% end %> <br /> <%= f.submit "Create" %> <% end % Thanks

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• How to delete a "Recurly" account completely from ruby api

  - by Subrahmanyam Konduri

  Can anyone please tell me how to delete a recurly account. As, I have tried with the following commands, r = Recurly::Account.find(account_code) r.delete And also, I have tried with "r.destroy". But, it only changing the state of recurly account from "active" to "closed" and not deleting the account completely. I am using rails 2.3.11 for this application. Thanks in advance. K. Subrahmanyam.

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• Use ruby Timeout class as background thread

  - by turri

  I found ruby class Timeout very useful for my project. But i need to run a block of code in background and keep it under a timeout.. For example Timeout::timeout(2) { block.call } How to do that?

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• Best way to get started with Facebook and Ruby on Rails

  - by TMB

  I'm looking to develop my first Facebook application and therefore looking for some advice on where to get started. I've spent a few hours browsing Facebook's Developer Wiki, Facebooker library, looking at the sample chapters in "Developing Facebook Applications with Rails" by Pragmatic Programmers, etc. Since FB is constantly changing their API, and Facebook Connect is newer than the aforementioned book, does anyone have any advice on where to get started?

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