Immutable Data Structures


Immutable data structures are data structures that cannot be modified after they are created. In other words, once an immutable data structure is created, its contents cannot be changed. Instead, any operation that would modify the data structure creates a new copy of the data structure with the desired changes. Immutable data structures are often used in functional programming, where the emphasis is on writing pure functions that do not have side effects. Immutable data structures make it easier to reason about the behavior of a program, since they eliminate the possibility of unexpected changes to data. They also make it easier to write concurrent programs, since multiple threads can safely access immutable data structures without the need for locks or other synchronization mechanisms.


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