Deep copy is useful in many situations. Here are a few typical application scenarios:
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In multithreaded programming, multiple threads may access the same object at the same time. In order to avoid risks in multithreaded operations, deep copy is usually used to create a brand new object copy.
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During data backup or data transfer, deep copy can be used to ensure the consistency of data between different locations.
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When the nesting relationship of objects is complex, deep copy can completely copy the entire object graph, thereby avoiding unnecessary reference problems.
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When writing a program, if you need to perform a copy operation on an object and do not want the original object to be affected, you can use deep copy to create a completely independent object.
In short, deep copy can ensure the integrity, consistency and independence of data, which is a very useful technology in program design.