AtomicKotlinCourse/Introduction to Objects/Constraining Visibility/Exercise 5/task.md

Mastering the IDE: Extract Function

IntelliJ IDEA allows you to extract repetitive code into a function. Select the following code in the body of the first function:

if (x <= 0) {
    println("Incorrect input: $x should be positive")
    return
}

Type the Extract Function action, or use the shortcut &shortcut:ExtractMethod;, or click on the main menu to choose Refactor | Extract | Function. Type the new function name checkArgument and press &shortcut:EditorEnter;.

Agree to Process Duplicates, so that the second occurrence of the same piece of code is also extracted.