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Extract constant

Last modified: 19 January 2023

Refactor | Extract/Introduce | Constant

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As Extract Variable, the Extract Constant refactoring lets you extract a specified value to a corresponding constant.

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

https://resources.jetbrains.com/help/img/idea/2022.3/rm_refactoring_extract_constant.png
Gif

To extract a constant:

Example

Before

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

After

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