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After the demo I would like to have a little quiz

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about the extract method refactoring. And I would like to ask you

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when is it appropriate to apply the extract method refactoring. Here I

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have a set of possible scenarios. First one is when there is

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duplicated code in two or more methods. When a class is too

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large. When the names of two classes are too similar. Or when

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a method is highly coupled with a class other than the one

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where it is defined. So as usual, please mark all that apply.