Deep copy is a programming term that refers to the process of creating a new object that has the same values as another object, but is stored independently. The spelling of deep copy is characterized by the phonetic transcription /diːp ˈkɒpi/. The first syllable, "deep," is pronounced with a long "e" sound as in "beep." The second syllable, "copy," is pronounced with an "o" sound as in "cot," and the emphasis is on the first syllable.
Deep copy refers to the process of creating an entirely new and separate copy of an object or data structure in computer programming. When a deep copy is performed, all the elements and attributes within the object are duplicated, including nested objects, arrays, or other complex data structures. In other words, any changes made to the original object after a deep copy has been created do not affect the copied object, and vice versa.
Unlike a shallow copy, which creates a new object but shares the same references to the internal elements, a deep copy ensures complete independence between the original and copied objects. This means that modifications made to one object are not reflected in the other since the data and memory locations are distinct.
Deep copying is particularly useful when dealing with nested or complex data structures, such as linked lists, trees, or objects with multiple levels of references. It ensures that all elements and attributes are fully replicated, maintaining the integrity of the original object while allowing separate manipulation and modification of the copied object.
Typically, deep copy operations involve traversing the entire object or data structure and creating new instances of each element encountered. This can be achieved either through manual coding or by leveraging built-in deep copy functions or libraries provided by programming languages and frameworks.
The term "deep copy" originated in the field of computer science, particularly in programming languages.
The word "copy" refers to creating a duplicate or replica of an object or data structure. It is derived from the Latin word "copiare", meaning "to transcribe" or "to write".
The prefix "deep" in "deep copy" indicates the level of copying. In computer science, when an object or data structure is copied, two different types of copies can be made: shallow copy and deep copy.
A shallow copy creates a new object or data structure, but its contents are references or pointers to the original object's data. Therefore, any changes made in one copy will affect the other. It only copies the references, not the actual data.
On the other hand, a deep copy creates a completely independent and separate copy of an object or data structure. It copies not only the references but also the actual data.