RubyMine
 
2022.2
Shortcuts: Windows
Get RubyMine
You are viewing the documentation for an earlier version of RubyMine.
  1. Write code
  2. Refactor code
  3. Extract refactorings
  4. Extract field

Extract field

Last modified: 09 August 2022

Refactor | Extract/Introduce | Field

Ctrl+Alt+F

The Extract Field refactoring lets you extract a specified value to an instance or class variable.

The animation below demonstrates how to extract a specific word from a string to an instance variable:

https://resources.jetbrains.com/help/img/idea/2022.2/rm_refactoring_extract_field.png
Gif

To extract a field:

Example

Before

class Hello
    def greet
        puts "Hello from JetBrains"
    end
    def bye
        puts "Goodbye from JetBrains"
    end
end

After

class Hello
    def initialize
        @name = "JetBrains"
    end
    def greet
        puts "Hello from #{@name}"
    end
    def bye
        puts "Goodbye from #{@name}"
    end
end