There is a widely known pattern called the Decorator. Some developers use it properly, some developers use it wrong, but most do not use it at all. I want to explain what the decorator is and when and how you have to use it.
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There are a lot of cases when a person may need general or specialized knowledge. However, in many cases, this person can not even identify which one is required. Let us check when each type of knowledge is useful and why a person may need it.
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