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An immutable object is one whose content cannot be changed.
An object can be immutable for various reasons, for example:

  • To improve performance (no planning for the object's future changes)
  • To reduce memory use (make object references instead of cloning the whole object)
  • Thread-safety (multiple threads can reference the same object without interfering with one other)

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 Contributors to this page: lpiot, Andrew_Pfeiffer, klez, hbloomer, kscarfone, panaggio
 Last updated by: lpiot,