Tagged Questions

Ruby is an open-source dynamic object-oriented interpreted language created by Yukihiro Matsumoto (Matz) in 1993.

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Nested file upload problems with showing the url for the file in Amazon-s3

I have a an activeadmin+carrierwave app. I am trying to nest a file upload model called artwork into the order form. The form is creating fine but the show page is not showing the file link nor is it ...
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5 views

Ruby multithreading Performance issues

I am building Ruby application. I have a set of images that I want to greyscale. My code used to be like this: def Tools.grayscale_all_frames(frames_dir,output_dir) number_of_frames = ...
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1answer
8 views

Why is this recursion terminating (correctly) by rounding down the decimals to integers?

How is n being rounded down to integers in this example so that the terminators are effective?? For example with wonky_coins(5), the next round of recursion should call for wonky_coins(2.5), ...
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12 views

Run command on Rails Console startup

Is there a way to run a specific command when the rails console starts? I'd like it to print out whether or not I'm connected to the remote or local database in BIG LETTERS! I don't mind writing a ...
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6 views

Heroku + Rails 3.2 + PostgreSQL = NoMethodError: undefined method `result' for #<NoMethodError:..>

NoMethodError: undefined method `result' for #< NoMethodError: ...> Stack trace refers to this place: def current_income return @current_income if defined? @current_income if ...
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5 views

Rake task not working with postgresql and sinatra-activerecord

I was trying to setup facebook app locally, using ruby and sinatra, in Kubuntu 12.04. I have included following gems in my gemfile. I have postgresql installed in my system and I am able to run the ...
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20 views

Rails 2.3.5 & ruby 1.8.7 issue while creating new application

I am using rails 2.3.5 & ruby 1.8.7. i am getting this error while creating the new application. ...
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7 views

VCR auto-rerecord not rerecording after first interval

I have a problem with auto rerecording of cassettes in vcr This is my config: VCR.configure do |c| c.cassette_library_dir = 'spec/support/vcr_cassettes' c.hook_into :fakeweb end and the call: ...
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10 views

Naming selenium grid nodes. Spawning a specific node

I'm trying to implement a kind of default queues in selenium hub. There is a possibility to specify node's name (actually its environment, smth like "firefox on ubuntu" or "chrome on windows"). ...
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1answer
15 views

What is TOPLEVEL_BINDING in ruby?

It doesn't equal the binding at the main thread, what is this toplevel scope? What does this scope differ from the binding at the main thread? > ruby -e 'puts TOPLEVEL_BINDING === binding' false
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1answer
20 views

Rails undefined method `image' for error

I wanted to add to my rails app a new model: rails g model Painting patient:references treatment:references image:string I run migration, and then added some lines to the other controllers In the ...
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2answers
22 views

Ruby: eval with string interpolation

I don't understand, why eval works like this: "123 #{456.to_s} 789" # => "123 456 789" eval('123 #{456.to_s} 789') # => 123 How can I interpolate into a string inside eval? Update: Thank ...
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2answers
48 views

Are ruby regular expressios the right way to go?

I am working on a linguistics project in which I need to search for patterns within a text. I need to search for the following pattern: „ blah blah blah **target word** blah blah". In other words, ...
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1answer
22 views

Is it possible to load / require only one function form a large Ruby module?

I wrote a quite big ruby module, it loads in about 3-4 secs. Most of the times I need only one function from it. To speed up things, is it possible to load / require only that particular function form ...
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2answers
14 views

EventMachine send data to one client (From Multi Server )

I have developed multiple eventmachine servers which are like require 'eventmachine' module EchoServer def post_init puts "-- someone connected to the echo server!" end def receive_data data ...

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