Safe Kolin
summary
Kotlin safety centers on limiting mutation and making guarantees explicit: prefer val over var and immutable objects, use data class copy for updates, hide mutable collections behind read‑only interfaces, and avoid leaking mutation points. Eliminate platform types early and never expose inferred concrete types from public APIs. Use require/check/assert for clear failures, use(...) to safely close resources, process large files with sequences, and note a concrete bug: turning a captured local prime into a var breaks the sieve producing 2 3 5 6 7 8… instead of primes.
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chapters (12)
- 0:00Introduction to safe Kotlin
- 1:25Mutability and its risks
- 5:41Kotlin’s tools for immutability
- 15:03Limiting scope and visibility
- 18:53Null safety and platform types
- 23:55Avoiding inferred types in APIs
- 24:15Expressing expectations with require/check/assert
- 29:59Handling failures without exceptions
- 33:34Safe null handling strategies
- 36:45Resource management with use
- 38:13Essential role of unit tests
- 40:19Book promotion and closing
