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by sriram_malhar
1494 days ago
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Well, it does matter, or rather, it could matter. For example, say you needed an undo/redo mechanism. If the model were guaranteed to be immutable model, you could simply hang on to the previous models as a sequence of state changes; undoing/redoing is trivial. If the model is mutable, then the undo/redo system has to defensively make a copy before update is called |
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