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  • Mark Matejcek thinks this is interesting:

Though you must take it somewhat on faith at this point in the book, this distinction can matter much in your programs. For objects that support such in-place changes, you need to be more aware of shared references, since a change from one name may impact others. Otherwise, your objects may seem to change for no apparent reason. Given that all assignments are based on references (including function argument passing), it’s a pervasive potential.


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