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:
![extract variable](https://resources.jetbrains.com/help/img/idea/2021.3/rm_refactoring_extract_variable.png)
To extract a variable:
Select a value to refactor or place a caret at a string containing the required value.
From the main menu, select
Ctrl+Alt+V.(Optional) If you place a 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.