Adding Layouts to Devise Views

Add following code to your Devise.rb file

# append to end of config/initializers/devise.rb
Rails.application.config.to_prepare do
  Devise::SessionsController.layout "devise"
  Devise::RegistrationsController.layout proc { |controller| user_signed_in? ? "application" : "devise" }
  Devise::ConfirmationsController.layout "devise"
  Devise::UnlocksController.layout "devise"
  Devise::PasswordsController.layout "devise"
end

Access WEBrick from a different PC

By using the below command, One can access webrick from different PC

rails s -b IP_ADDRESS -p PORT

Fetch a Average Color from an Image

One can fetch a average color from an image using Rmagick with the below snippet.

img =  Magick::Image.read("http://SOME_IMAGE_URL").first
pix = img.scale(1, 1)
avg_color_hex = pix.to_color(pix.pixel_color(0,0)

It will return the Color code(The maximum color used in that image).

Screens in Ubuntu

Screen is a terminal multiplexer, which allows a user to access multiple separate terminal sessions inside a single terminal window or remote terminal session. Sometimes you need to run a rake task or something else which keep on producing logs and you want to keep it running even you close your terminal.

1. Install Screen

sudo apt-get install screen screen-profiles screen-profiles-extras

2. Create Screen

screen -S name_of_screen

Run your Task in this screen.

3. Detach Screen

ctlr + a then d