When I try to add a module into a device, Packet Tracer pop-ups a warning message saying "Cannot add a module when the power is
1 answer:
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Answer:
Attached are screenshots of the working code - baring in mind this only works on mutable Collection types. (ones that can be changed) if you use Collections that don't support this you may experience an Unsupported Operation Exception - but this is expected.
Explanation:
Using Java streams as an alternative for some answers.
