Extract constant
Refactor | Extract/Introduce | Constant
CtrlAlt0C
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:

To extract a constant:
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 | Constant CtrlAlt0C.
(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 constant name and press Enter.
Before
puts "Hello from JetBrains"puts "Goodbye from JetBrains"
After
NAME = "JetBrains"puts "Hello from #{NAME}"puts "Goodbye from #{NAME}"
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