What You See & What You Get

on YouTube ↗16m

" summary

Shows concrete mismatches between Scala source and the JVM bytecode: uses javap to inspect classfiles and demonstrates how Scala default arguments compile into mangled $ names that Java callers must reference, and how companion objects become a companion object singleton with $-suffixed classes and module accessors. Demonstrates the ugly Java view for defaults and constants, explains the generated identifiers, and recommends limiting defaults to common cases or adding Java-friendly helpers so JVM users don’t have to call weird mangled names.

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" chapters (8)

1. 0:00Start
2. 2:02Where Does My Story Start
3. 2:25Always Finish What's on Your Plate
4. 6:11Back Translations
5. 7:42Default Arguments
6. 9:51Name Collisions
7. 11:30Companion Objects
8. 13:11Companions

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