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Your computer speakers, disk drive, printer, microphone, modem, and mouse are examples of devices. All of them can be replaced or installed separately. In computing, a device driver converts general commands into a language that a piece of equipment understands ? it is, in effect, a translator.

Adding Authentication with Devise and set up Devise, including generating a Devise User model class (as depicted in Figure 5) along with the sign-up and sign-in pages. Create the sign-in/sign-out/sign-up hyperlinks. Restrict access to controller actions to only users who are signed in.

Devise is an excellent authentication system made for Rails that allows us to easily drop-in User functionality into our project. Add Devise to your Gemfile and run bundle .

In this article, we will look at the steps needed to integrate Devise into a Ruby on Rails application. Step 1: Add Devise to the Gemfile. ... Step 2: Run Devise Generator. ... Step 3: Generate Devise Models. ... Step 4: Update Routes. ... Step 5: Add Devise Views. ... Step 6: Update Application Controller.

Input devices, such as a mouse and a keyboard. Output devices, such as a monitor and a printer. Storage devices, such as a hard drive or flash drive.

The most common input devices are the keyboard, mouse, and touch screen. Portable keyboard, wireless mouse, and iPhone. There are hundreds of other input devices, like microphones to capture sound waves, scanners to capture image data, and virtual reality devices to capture our body movements.

Countable noun. A device is an object that has been invented for a particular purpose, for example for recording or measuring something. ... an electronic device that protects your vehicle 24 hours a day.