Extract/Introduce variable

The Extract Variable refactoring lets you extract a specified value to a corresponding variable. You can use this refactoring for basic Ruby data types (for example, strings, arrays, hashes) and class instances.

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

To extract a variable:

Select a value to refactor or place the caret at a string containing the required value.
In the main menu, go to Refactor | Extract/Introduce | Variable Ctrl+Alt+V.
(Optional) If you place the caret at a place containing several expressions available for extracting, select the required expression and press Enter:
(Optional) If more than one occurrence of the expression is found, specify whether you wish to replace only the selected occurrence or all the found occurrences with the new variable:
Specify the variable name and press Enter.

Example

                    puts "Hello from JetBrains"
                    puts "Goodbye from JetBrains"
                

                    name = "JetBrains"
                    puts "Hello from #{name}"
                    puts "Goodbye from #{name}"
                

Last modified: 08 October 2024