That depends on the requirements of the use case. That's also an important skill for developers to learn, knowing how much you need to understand from a code base to be able to use it for your goals.
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How far is a person going to go if he/She doesn't understand how it works?
That depends on the requirements of the use case. That's also an important skill for developers to learn, knowing how much you need to understand from a code base to be able to use it for your goals.