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There's no law stopping you returning a new object from a method outside the builder pattern. Immutable objects are a pretty old idea, smalltalk had select (ma

There's no law stopping you returning a new object from a method outside the builder pattern. Immutable objects are a pretty old idea, smalltalk had select (map) methods that returned a whole new collection back in the 80s.

stickfigure 4y ago
...and in fact most strings in OOP languages work like this: String next = original.substring(2);