Technology
Ubuntu 12.04 is still one of the most popular linux distros with LTS term, yet it is packaged with a very outdated munin 1.4.6 binary distribution. Munin is a networked resource monitoring tool that can help analyze resource trends and “what just happened to kill our performance?” problems. It is designed to be very plug … More Install Munin 2.0.x on Ubuntu 12.04
Htop is a free process viewer for Linux. Below is the Column descriptions of htop: PID: A process’s process ID number. USER: The process’s owner. PR: The process’s priority. The lower the number, the higher the priority. NI: The nice value of the process, which affects its priority. VIRT: How much virtual memory the process … More Htop columns description
From Agile Manifesto It impresses you as a developer, and you will shout “Yeah, I need it.”. Individuals and interactions over processes and tools Working software over comprehensive documentation Customer collaboration over contract negotiation Responding to change over following a plan But if you read the first sentence We are uncovering better ways of developing … More Agile software development
USB devices grayed out due to permission Here, I assume that you already installed VirtualBox Extension Packs 1. Usually VirtualBox will add “vboxusers” group for you, but if not 2. Change /dev/vboxdrv group to vboxusers 3. Add read/write permission for group to /dev/vboxdrv 4. Add your user to vboxusers group 5. Logout and login again … More Virtualbox 4.0 USB devices grayed out
1. Pre-requisite 2. Configure gem for your test environment In config/environments/test.rb add: 3. add test/blueprints.rb: 4. Include blueprints.rb in test_helper.rb 5. Reset stub data for each test in test_helper.rb 6. In your test method
It’s been a great pleasure to be able give a tech talk about TDD – Test Driven Development @DevCamp last Saturday. That’s how I realize that “The best way to learn is to teach”, not only during the session, feedback or discussion just slide and demo preparation show me about the power of community, a … More Last week TDD Session @DevCamp
Run the test You should see 1) Error: test_assert_valid_is_depreciated(UserTest): NoMethodError: undefined method `assert_valid’ for … … Alternative
ជាទូទៅ Helper ក្នុង Rails ត្រូវបានប្រើប្រាស់ដើម្បីសម្រួសដល់ View rendering ដូច្នេះហើយ method ដែលនៅក្នុង Helper មិនដំណើរការទេបើអ្នកយកវាទៅប្រើនៅក្នុង Controller។ /app/helpers/formating_helper.rb module FormatingHelper def to_yes_no(value) value == true ? "yes" : "no" end end It will raise unitialized method exception when you trying to access the helper method in controller. In order for this to work you can fake the helper … More Use Helper module within controller (Rails)
1. Create Rails project $ Rails rails 2. Run scaffold Go to rails directory $ script/generate scaffold book title:string author:string year:integer 3. Do migration $ Rake db:migrate 4. Add support for JSON rendering Update books_controller.rb 5. Enjoy Start the server $ script/server then go to browser type: http://localhost:3000/books.json
1. Update server and install related packages: 2. Manually Install rubygems (Packaging system) Manually install rubygems so you can get the version we are going to install. wget http://rubyforge.org/frs/download.php/60718/rubygems-1.3.5.tgz tar xvfz rubygems-1.3.5.tgz ruby rubygems-1.3.5/setup.rb ln -s /usr/bin/gem1.8 /usr/bin/gem gem update –system #Tidy Up rm -rf rubygems-1.3.5.tgz rubygems-1.3.5 3. Install rails and require packages: … More Install Ruby on Rails on Ubuntu
The sky's the limit 