asmhatre
38fbd513c9
Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_017ic4b4X2xx7RrveVQU9R1N
16 lines
633 B
Plaintext
16 lines
633 B
Plaintext
== 1. A record does not copy the list you give it ==
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leaky.items() = [pen, book, laptop]
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after leaky.items().add("phone"), basket = [pen, book, laptop, phone]
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== 2. List.copyOf in the compact constructor ==
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safe.items() = [pen, book]
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safe.items().add(...) -> UnsupportedOperationException
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== 3. 'Changing' a record means building a new one ==
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safe = SafeOrder[id=A-2, items=[pen, book]]
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bigger = SafeOrder[id=A-2, items=[pen, book, charger]]
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== 4. A mutable Date component ==
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LeakyEvent.when().getTime() after caller mutates d1 = 86400000
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SafeEvent.when().getTime() after both mutations = 0
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