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Ruby

Ruby is an open-source dynamic object-oriented interpreted language that supports multiple programming frameworks including functional, object oriented and imperative. It also has a dynamic type system and automatic memory management. Ruby focuses on simplicity and productivity. Ruby's market share spiked due to Ruby on Rails, a model-view-controller (MVC) framework for building web applications.

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I am using rubinus 3.86 and CentOS7(x86_64).
The installation directory is / var / home / ap / rubinius.

I attempted to install nio4r using the gem command and it failed.
The log at that time is as follows.

It is described as "method_missing", but what does it mean?

cat /var/home/ap/rubinius/gems/extensions/x86_64-linux/2.3/nio4r-2.1.0/gem_make.out

current directory: /var/home/ap/rubinius/gems/gems/nio4r-2.1.0/ext/nio4r
/ var / home / ap / rubinius / bin / rbx -r ./siteconf20171112-15122-n0ryc2.rb extconf.rb --with-ldflags = - L / var / home / lib / gcc5 / lib64
checking for unistd.h ... yes
checking for sys / select.h ... yes
checking for poll.h ... yes
checking for sys / epoll.h ... yes
checking for sys / event.h ... no
checking for port.h ... no
checking for sys / resource.h ... yes
                  main # Rubinius :: Loader at core / loader.rb: 861
                script # Rubinius :: Loader at core / loader.rb: 679
           load_script. Rubinius :: Code Loader at core / code_loader.rb: 590
           load_script # Rubinius :: Code Loader at core / code_loader.rb: 505
            __script__ # Object at extconf.rb: 21
   << (method_missing) # Kernel (NilClass) at core / zed.rb: 1413

undefined method `<< 'on nil: NilClass. (NoMethodError)

An exception occurred running extconf.rb
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and / or headers. Check the mkmf.log file for …
0
Free Tool: ZipGrep
LVL 11
Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

0
Hello, I see below script starting like

require 'MonitoringScript'
class CheckSnmp < MonitoringScript

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I am wondering what is MonitoringScript ? is it gem? and what below does?

class CheckSnmp < MonitoringScript

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Really appreciate any help and guidance.
0
A traveller searches for trips from Bern to Berlin on Dec 25, 2013, from 8am (one-way).
A list of the 20 first results returned by a tool is given in the attached ex3-data.json file.

Tips: most fields are self-explanatory, while some may need explanation:
1. boo_return is true for a return trip, false otherwise
2. workTime_sec is the duration that the traveler can work during that part of the trip in seconds.
3. duration_out_sec is the duration of the corresponding outbound part of the trip, in seconds. For return trip, if applicable, there will be a similar field duration_in_sec for the duration of the inbound trip part.

Goals
1. Propose a solution to rank the list of results provided in the attached file.
2. Output the list of ranked results to a file named ex3-output.json.
   Each result must have two additional properties “rank” and “score”, respectively storing the final rank and the score of the trip (If applicable).

========================================
ex3-data.txt
0
I want to call a C++ project from Ruby, but my knowledge of the C build process is shaky at best, so unsure of how to set compiler flags (and why) as well as how to reference and link the project files. Currently RubyInline seems like the quickest option, but open to other suggestions.
0
How difficult is it for someone to make an AI interface that can be used on my computer, that can access anything from google maps when asking where something is located (like siri) all the way to being able to scan a hard drive for the contents held within it? I work for this small company and all we do is use google maps and take old hard drives and scan them for their contents, upon request by customer, and retrieve data deleted, lost, or just unreachable due to computer malfunction. I want to see if there is an easier way to do this, by using an AI to do all the hard work, and all we have to do is tell it to scan the drive and collect the lost data and store it into either a zip file or something as such. Please let me know thoughts. Am also flexible, doesn't have to be in ruby, but a lot of things we do, we use ruby based programs that's why I'm curious if its possible.
0
Thank you for watching.
I'm trying to create a custom filter on ActiveAdmin.
I tried to find a solution with referencing online articles.
But, I couldn't. Plese, help me.

There are two models called PointPayment and Contract.

PointPayment
# Table name: point_payments
#
#  id           :integer          not null, primary key
#  user_id      :integer
#  contract_id  :integer
#  amount       :float(24)
#  created_at   :datetime         not null
#  updated_at   :datetime         not null
#  state        :integer          default(0)
#  payment_type :integer          default(0)

class Contract < ActiveRecord::Base
  has_many :point_payments, dependent: :destroy
end

Contract
# Table name: contracts
#
#  id                         :integer          not null, primary key
#  client_id                  :integer
#  advisor_id                 :integer

class PointPayment < ActiveRecord::Base
  belongs_to :contract
end

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I'd like to filter Contract with "payment_type."
But, Contract model hasn't payment_type.
So, I have to filter records of PointPayment model with payment_type at first and pick "contract_id" up from them.
And then, I filter Contract model records with the contract_ids.

The payment_type has four types 0 to 3.
But, I'll only use three types ( 1 to 3 ) for filtering.

Now, I wrote below codes. But, It doesn't work.
I'm stuck. I don't even know how I should search.

models/contract.rb
class Contract < ActiveRecord::Base
  scope :payment_type_one, -> { PointPayment.find_by(payment_type: 1) }
  scope :payment_type_two, -> { PointPayment.find_by(payment_type: 2) }
  scope :payment_type_three, -> { PointPayment.find_by(payment_type: 3) }

  scope :payment_types, lambda { |payment_types|
    case payment_types
    when 2
      pt = payment_type_one
      Contract.id(pt.contract_id)
    when 3
      pt = payment_type_two
      Contract.id(pt.contract_id)
    when 4
      pt = payment_type_three
      Contract.id(pt.contract_id)
    end
  }

  def self.ransackable_scopes(_auth_object = nil)
    %i(payment_types)
  end

end

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adminn/contract.rb
ActiveAdmin.register Contract do
  filter :payment_types, as: :select, collection: proc { [%w(Type1 2), %w(Type2 3), %w(Type3 4)] }
end

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0
I have inherited a cookbook from another developer and when I run "berks install" I get the following error output.

{dir removed}/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/solve-3.1.0/lib/solve/ruby_solver.rb:80:in `block in resolve': undefined method `name' for nil:NilClass (NoMethodError)
        from /{dir removed}/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/solve-3.1.0/lib/solve/ruby_solver.rb:79:in `each'
        from /{dir removed}/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/solve-3.1.0/lib/solve/ruby_solver.rb:79:in `inject'
        from /{dir removed}/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/solve-3.1.0/lib/solve/ruby_solver.rb:79:in `resolve'
        from /{dir removed}/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/solve-3.1.0/lib/solve.rb:64:in `it!'
        from /{dir removed}/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/berkshelf-5.6.4/lib/berkshelf/resolver.rb:78:in `resolve'
        from /{dir removed}/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/berkshelf-5.6.4/lib/berkshelf/installer.rb:176:in `install_from_universe'
        from /{dir removed}/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/berkshelf-5.6.4/lib/berkshelf/installer.rb:40:in `run'
        from /{dir removed}/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/berkshelf-5.6.4/lib/berkshelf/berksfile.rb:422:in `install'
        from /{dir removed}/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/berkshelf-5.6.4/lib/berkshelf/cli.rb:143:in `install'
        from /{dir …
0
I am working on a POC to read data from a DB using Logstash and create a JSON nested document and put it into elasticsearch. I am unable to create the JSON and was wondering using RUBY for the same however I am new to RUBY and need some help doing the same
The JSON I want created is
 { ParentId:1, ParentName:pName,
Child[
{
ChildId:1,
ChildName:cname1,
}

{
ChildId:2,
ChildName:cname2,
}


]
}


Any help in this regard will be appreciated. I need this urgently
0
I am trying to get a RoR application running on Ubuntu 15.10, the app runs on:
* Apache
* MySQL
* Ruby on Rails

Should I install Apache first, then CD to the Apache directory before installing rails? The reason I ask is there is one GEM that needs to be installed manually:
sudo gem install jquery-rails -v 3.1.4

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I have just did a clean Ubuntu 15.10 and started installing Ruby, however I am thinking, should I have installed Apache first? Is there an order to installing RoR for Apache, where I need to be in the apache directories for GEM commands?

I am a Linux newbee, thanks in advance!
0
Concerto Cloud for Software Providers & ISVs
LVL 5
Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

I just spun up an Ubuntu 15.1 server on GoDaddy VPS.

I am trying to get a ruby web app working, when I enter command:
 ruby -v

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I get  back: ruby 2.1.5p273 (2014-11-13) [x86_64-linux-gnu]

however, in my home directory I see a folder named ruby-2.4.0. Why is my Ubuntu server not using Ruby 2.4?
0
Hello,

I have two versions of SASS installed.

SASS (3.4.22, 3.4.21)

Should I uninstall one of them, or leave as is?

If i should uninstall, what command shall I issue at the command line? I am running windows10.

Thanks
0
I am migrating an existing Ruby on Rails application.   I have setup a development environment in Ubuntu with Ruby 1.8.7 and Rails 2.3.12 and SQLite 2.8.17.

I would like to download the production source and install on the development computer.   What do I need to download and move?
0
I’ve been trying to find alternatives to using sleep for some time and it seems that every single suggested method to avoid using sleep never works and I’m at the end of my rope.

      it 'finds the correct product when searching by job type', js: true do
        fill_in('filterrific_for_work_type', with: 'Central')
        # once again, sleep feels like the only thing that works
        #sleep 1 # TODO: find a better way..
        expect(find('#work_queue_items_filter_reset')).to have_content('Reset All Filters')
        expect(page).to have_link('IP Central Report',
                                  href: work_queue_item_path(@release.id))
      end

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I also have this wait for ajax helper:

module CapybaraHelpers
  def wait_for_ajax
    Timeout.timeout(Capybara.default_max_wait_time) do
      loop until finished_all_ajax_requests?
    end
  end

  def finished_all_ajax_requests?
    page.evaluate_script('jQuery.active').zero?
  end
end

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And in spec_helper.rb:

RSpec.configure do |config|
config.include CapybaraHelpers, type: :feature
End

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This test breaks unless I add the sleep 1.  and I’ve tried so many iterations using things like ‘within’ ‘find’, ‘have_content’ ect.  This is really driving me crazy.
0
I’ve been trying to find alternatives to using sleep for some time and it seems that every single suggested method to avoid using sleep never works and I’m at the end of my rope.

     it 'finds the correct product when searching by job type', js: true do
        fill_in('filterrific_for_work_type', with: 'Central')
        # once again, sleep feels like the only thing that works
        #sleep 1 # TODO: find a better way..
        expect(find('#work_queue_items_filter_reset')).to have_content('Reset All Filters')
        expect(page).to have_link('IP Central Report',
                                  href: work_queue_item_path(@release.id))
      end

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I also have this wait for ajax helper:

module CapybaraHelpers
  def wait_for_ajax
    Timeout.timeout(Capybara.default_max_wait_time) do
      loop until finished_all_ajax_requests?
    end
  end

  def finished_all_ajax_requests?
    page.evaluate_script('jQuery.active').zero?
  end
end

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And in spec_helper.rb:

RSpec.configure do |config|
config.include CapybaraHelpers, type: :feature
End

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This test breaks unless I add the sleep 1.  and I’ve tried so many iterations using things like ‘within’ ‘find’, ‘have_content’ ect.  This is really driving me crazy.
0
There are two models:

    # == Schema Information
    #
    # Table name: news
    #
    #  id         :integer          not null, primary key
    #  title      :string           not null
    #  content    :text             not null
    #  scope      :string           not null
    #  created_at :datetime         not null
    #  updated_at :datetime         not null
    #  person_id  :integer          not null
    
    # == Schema Information
    #
    # Table name: likes
    #
    #  id        :integer          not null, primary key
    #  like      :boolean
    #  person_id :integer          not null
    #  news_id   :integer          not null

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Relation

    news has many likes
    like belongs to news

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I want to get most liked news from query. Query should subtract count of likes equal true from likes equal false. The highest number is most liked news.
What I tried:
@most_liked_news = News.joins(:likes).where('likes.like = ?', true).group('news.id').order('COUNT(likes.like) DESC').first

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Above returns news that has most positive likes. But it's not all good, because e.g. post with 10 positive and 1 negative will be better than post with 20 positivie and 15 negative(10 - 1 > 20 -15)
0
There are three models:

    # Table name: activities_people
    #
    #  activity_id :integer          not null
    #  person_id   :integer          not null
    #  date        :date             not null
    #  id          :integer          not null, primary key
    #
    # Table name: activities
    #
    #  id          :integer          not null, primary key
    #  name        :string(20)       not null
    #  description :text
    #  active      :boolean          not null
    #  day_of_week :string(20)       not null
    #  start_on    :time             not null
    #  end_on      :time             not null

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Third model is people.
Associations:

 
  class Activity < ActiveRecord::Base
      has_many :activities_people
      has_many :people, through: :activities_people
    end
    
    class ActivitiesPerson < ActiveRecord::Base
      belongs_to :person
      belongs_to :activity
    end
    
    class Person < ActiveRecord::Base
    has_many :activities, through: :activities_people
    end

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Issue:
I don't know how to create validation method in ativities_person.rb to protect joining on activities, that my other training interests overlaps timely.

Example:

person_id:1 join to activity, that will 08.08.2016(date) and last 09:00(start_on) - 10:00(end_on).
 Same person want save to another activity, that will also be 08.08.2016 and last 09:30(start_on) - 10:30(end_on). Now
validation should throw error that he's save to other activity in same time(time ranges overlap). Validation first should check that dates match, next should check time overlaps of activities.

What I tried:

 

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0
I have two models, `Genre` and `Book`. They both have a `has_and_belongs_to_many` association.
What i'm doing is scraping a site and collecting the information of each book. I'm running into an issue updating genres to an existing book and genre in my DB.

Below is an example of how my array of genres are going to come out.

    genres = ["Action", "Drama", "Romance"]

I was thinking of doing this to check if i already have the genre in the database and if it does exist it will update it.

    genre = Genre.where(title: genres).first_or_create
    anime.update(genres: genre)

I end up getting this error.

    `undefined method `each' for #<Genre:0x007f9059868bc0>

Is there a simple way for me to do this? This would really help me.
0
If I'm not mistaken we have a symbol and a hash but still I don't get why we have this syntax can you elaborate me or guide me what to read?
class Tweet < ActiveRecord::Base
  has_one :location, foreign_key: :tweeter_id, dependent: :destroy
end

Open in new window

Thanks
0
What does it mean to be "Always On"?
LVL 5
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

I get the following error below with the attached ruby script and text file. Please note you will need to include the text file in the command line after entering the ruby file name. I tried referring to the variable 'mystery_word' in the script as an array but get the same error. Please help. Thanks.

'hangman.rb:47:in `<main>': undefined method `each' for "<mystery word>":String (NoMethodError)'
ruby_hangman.txt
wordsHangman.txt
0
This is Chef cookbook question.

Question: I need to dynamically reference an index.html file located on github.com within the recipe.

Apache2:

template '/var/www/html/index.html' do
   source index.html.erb
end

In the above code, /var/www/html/index.html file is being replaced with index.html.erb located in <cookbook>/template/default/index.html.erb file. What I want is instead of index.html.erb, I need to use https://github.com/<repository>/myIndex.html

If there is any change in myIndex.html, it should reflect in /var/www/html/index.html realtime.

I appreciate your help.
0
I have a Ruby application that I have migrated to gtk3. Most things are working but changing the background color does not work for Entry's . I It works fine for buttons. The commands are of the form:

color = Gdk::RGBA.parse("lightblue1")
 widget.override_background_color(0, color)

gtk3 wants RGBA colors. Another report of this problem  said they only got it working using css . This requires using style & providers. Are there any examples of how to do this in Ruby.
0
I want to run an installer with a GUI which takes bunch of parameter during installation. This is for my github project https://github.com/CodersKarma/OracleCommerceCRS-vagrantbox
where I am using packer to automate installation of Oracle Commerce.

I am a developer with little knowledge in the field of System administration. I know that puppet and/or chef can be used, I have no idea how to write puppet or chef scripts/recipe.
0

Ruby

Ruby is an open-source dynamic object-oriented interpreted language that supports multiple programming frameworks including functional, object oriented and imperative. It also has a dynamic type system and automatic memory management. Ruby focuses on simplicity and productivity. Ruby's market share spiked due to Ruby on Rails, a model-view-controller (MVC) framework for building web applications.

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