Static and Parameterized Gotchas: Exercises

Practice exercises

Exercise 1

IDs from pkt#(int) and pkt#(byte) are interleaved, but requirement says each type starts at zero. What structural refactor solves this cleanly?

Solution

Move the static counter from shared base into the parameterized class (or per-type registry keyed by type). This scopes state to each specialization.

Exercise 2

A box#(payload) clone passes unit tests, but regression shows expected data mutating after enqueue. What hidden bug pattern is likely?

Solution

clone is shallow for item handle. Deep-copy the payload object and internal dynamic arrays before enqueuing expected snapshots.

Related topics

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