Immutability
Terminology
Immutability ¶ An object is immutable if outside entities cannot change its internal properties.
Facts, Thoughts and Opinions
Virtues of Immutable Objects
- Immutable objects are simpler to construct, test, and use.
- Truly immutable objects are always thread-safe.
- Immutable objects help avoid temporal coupling.
- The usage of immutable objects is free of side effects (no defensive copies).
- Immutable objects always have failure atomicity.
- Immutable objects are much easier to cache.
- Immutable objects prevent NULL references.
Images
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Sources & Bookmarks
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