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• installing a ruby gem with a native extension

  - by ajstack

  I want to install a ruby gem which tries to build a native extension. The gem in this case is nokogiri. If I do gem install nokogiri, the native extension dynamically links against libxml, libxslt libs. I want to statically link against those libs. How should I go about this?

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• suggestion box in ruby on rails

  - by ohana

  hi, anyone know how to create a suggestion box in ruby on rails? all the materials i found so far are about observe some text field and update some list in other , not related to suggestion box... Thanks!

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• Reading in gzipped data from S3 in Ruby

  - by Evan Zamir

  My company has data messages (json) stored in gzipped files on Amazon S3. I want to use Ruby to iterate through the files and do some analytics. I started to use the 'aws/s3' gem, and get get each file as an object: #<AWS::S3::S3Object:0x4xxx4760 '/my.company.archive/data/msg/20131030093336.json.gz'> But once I have this object, I do not know how to unzip it or even access the data inside of it.

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• Way to partialy match a Ruby string using Regexp

  - by Fabiano PS

  I'm working on 2 cases: assume I have those var: a = "hello" b = "hello-SP" b = "not_hello" 1 - Any partial matches I want to accept any string that has the var a inside, so b and c would match. 2 - Patterned match I want to match a string that has a inside, followed by '-', so b would match, c does not. I am having problem, because I always used the syntax /expression/ to define Regexp, so how dinamicaly define an RegExp on Ruby??

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• Count the number of lines in a file with Ruby, without reading entire file into memory

  - by smnirven

  I'm processing huge data files (millions of lines each). Before I start processing I'd like to get a count of the number of lines in the file, so I can then indicate how far along the processing is. I am using Ruby, and because of the size of the files, it would not be practical to read the entire file into memory just to count how many lines there are. Does anyone have a good suggestion on how to do this?

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• How to validate SSL certificate chain in ruby with net/http

  - by maledictus

  How can I verify the certificates of a site like https://processing.ukash.com/ in ruby with net/http? https = Net::HTTP.new('processing.ukash.com', 443) https.use_ssl = true https.verify_mode = OpenSSL::SSL::VERIFY_NONE Works so far, but how do I verify that it's the right cert now? I saved the certificate from within firefox, but the resulting .pem file has many certificates in it and net/http doesn't seem to like it.

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• Ruby character encoding issue

  - by Roland Soós

  Hi, I write a little ruby script, which sends me an email when a new commit added to our svn. I get the log with this code: log = `/usr/bin/svnlook log #{ARGV[0]}` When I run my script from bash I get good encoded character in the email, but when I try it and create a new commit I get wrong hungarian characters. I commited this: tes oéá I get this in the email: Log: tes ?\197?\145?\195?\169?\195?\161 How can I solve this issue?

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• Checking deployed port in ruby on rails application

  - by john chan

  Is there an elegant way to check which port you deployed a ruby on rails application using mongrel? I could not find a directive (i.e. such as #{RAILS_ROOT} which contains the root directory of the application) that I can use to perform a check. I need this to do a check since I am deploying the same application on different ports and I need the app to do different things according to the port that is being accessed. Any help would be appreciated, Thanks

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• How to generate Ruby documentation using different template?

  - by htanata

  I want to generate the Ruby documentation with hanna template. How to do that? Or where can I download it if it's available at all? Using rdoc -o ~/doc --inline-source --line-numbers --format=html --template=hanna gives me docs with missing methods. It seems like it doesn't generate methods written in C.

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• Execute ruby code in a link in Haml

  - by thermans

  I want to have a "delete user" link in a normal Activerecord table, but I can't figure out how to wrangle the inline ruby in haml. I have this: %tbody - @users.each do |user| %tr %td= user.name %td= user.login %td %a %img{:src => '../images/delete.png', :title => 'Delete user'} How do I make the - user.destroy be a clickable link in Haml?

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• Where can I get a Ruby 1.8.6 for Centos OS

  - by Yong

  Hi. Can anyone tell me where I can find a Ruby 1.8.6 so I can istall it in my Centos 5 machine? Thank you.

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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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• 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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• Logging a certain event only once in ruby

  - by Andrew Grimm

  Are there any logging frameworks in ruby that allow you to log a specific event type only once? logger = IdealLogger.new logger.log(:happy_path, "We reached the happy path") # => logs this message logger.log(:happy_path, "We reached the happy path yet again") # => Doesn't log this logger.log(:sad_path, "We've encountered a sad path!") # => logs this message Also, is there a term for the concept of logging a certain event type only once?

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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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• 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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• 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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• 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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• Custom formats in Ruby on Rails

  - by Koning Baard XIV

  I'm creating a website in Ruby on Rails, where users can login using RESTful Authentication. Someone can get a specific user using html, xml and json, just like scaffolding. But I want to add one more format: vCard (e.g. /users/1.vcard). This has a specific format, but how do I define my own formats? Using views, or must I use another way? Thanks

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• Extract number from string in Ruby

  - by Oscar Reyes

  I'm using this code: s = line.match( /ABCD(\d{4})/ ).values_at( 1 )[0] To extract numbers from strings like: ABCD1234 ABCD1235 ABCD1236 etc. It works, but I wonder what other alternative I have to to this in Ruby?

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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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• 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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• Planning to create PDF files in Ruby on Rails

  - by deau

  Hi there, A Ruby on Rails app will have access to a number of images and fonts. The images are components of a visual layout which will be stored separately as a set of rules. The rules specify document dimensions along with which images are used and where. The app needs to take these rules, fetch the images, and generate a PDF that is ready for local printing or emailing. The fonts will also be important. The user needs to customize the layout by inputting text which will be included in the PDF. The PDF must therefore also contain the desired font so that the document renders identically across different machines. Each PDF may have many pages. Each page may have different dimensions but this is not essential. Either way, the ability to manipulate the dimensions and margins given by the PDF is essential. The only thing that needs to be regularly changed is the text. If this is takes too much development then the app can store the layouts in 3rd party PDFs and edit the textual content directly. Eventually though, this will prove too restrictive on the apps intended functionality so I would prefer the app to generate the PDF's itself. I have never worked with PDFs before and, for the most part, I've never had to output anything to the user outside their monitor. A printed medium could require a very different approach to get the best results. If anyone has any advice on how to model the PDF format this it would be really appreciated. The technical aspects of printing such as bleed, resolution and colour have already been factored in to the layouts and images. I am aware that PDF is a proprietary file format and I want to use free or open source software. I have seen a number of Ruby libraries for generating PDF files but because I am new on this scene I have no way to reliably compare them and too little time to implement and test them all. I also have the option of using C to handle this feature and if this is process intensive then that might be preferred. What should I be thinking about and how should I be planning to implement this?

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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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