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  • What is the difference between a deep copy and a shallow copy?
    Breadth vs Depth; think in terms of a tree of references with your object as the root node Shallow: The variables A and B refer to different areas of memory, when B is assigned to A the two variables refer to the same area of memory Later modifications to the contents of either are instantly reflected in the contents of other, as they share contents Deep: The variables A and B refer to
  • c++ - Deep copy vs Shallow Copy - Stack Overflow
    The terms deep vs shallow copy aren't typically used in C++, since they don't map particularly well to the language In Java and several other languages, the distinction is more useful because of their reference-based semantics, making shallow copy unavoidable in most cases In C++, where objects are copied by value, true shallow copies are very rare, but the default copy constructor won't
  • What is the difference between shallow copy, deepcopy and normal . . .
    Normal assignment operations will simply point the new variable towards the existing object The docs explain the difference between shallow and deep copies: The difference between shallow and deep copying is only relevant for compound objects (objects that contain other objects, like lists or class instances): A shallow copy constructs a new compound object and then (to the extent possible
  • clone - In Java, what is a shallow copy? - Stack Overflow
    A shallow copy is a copy of the reference pointer to the object, whereas a deep copy is a copy of the object itself In Java, objects are kept in the background, what you normally interact with when dealing with the objects is the pointers
  • Shallow copy and deep copy in C - Stack Overflow
    No A shallow copy in this particular context means that you copy "references" (pointers, whatever) to objects, and the backing store of these references or pointers is identical, it's the very same object at the same memory location A deep copy, in contrast, means that you copy an entire object (struct) If it has members that can be copied shallow or deep, you also make a deep copy of them
  • c# - Shallow copy or Deep copy? - Stack Overflow
    Is this a shallow copy or a deep copy ? Can anyone please provide the answer with reason If it is a deep copy, then please provide the code for shallow copy for this program doing the same job of object copying, and the other way around If the above is a shallow copy, then even this should be a shallow copy-->
  • std vector C++ -- deep or shallow copy - Stack Overflow
    The 'deep' vs 'shallow' distinction doesn't make much sense in a language that defaults to value semantics and doesn't try to hide the fact that it uses pointers (so that pointers are objects with their own values, distinct from the object they reference) Copies will always be by-value, and whether that constitutes 'deep' copying vs 'shallow' copying depends on your definition
  • Cloning an array in Javascript Typescript - Stack Overflow
    Looks like you made a shallow copy of the array It sounds like you're modifying the objects they were holding and seeing the changes You need to make a deep copy or come up with a different way to represent your data
  • java - Deep copy, shallow copy, clone - Stack Overflow
    To copy an object, something needs to use new, either explicitly or under the hood Now for "shallow" versus "deep" copying of objects Shallow copying generally means copying only one level of an object, while deep copying generally means copying more than one level The problem is in deciding what we mean by a level Consider this:
  • Default assignment operator= in c++ is a shallow copy?
    So objects containing pointer members are shallow-copied by default operator= There are various efforts at writing smart pointers that perform clone operations on copying, so if you use those everywhere in place of raw pointers then the default operator= will perform a deep copy





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