Scala 2 Book migration - Scala Classes #3128
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gkepka
commented
Dec 12, 2024
| {% tabs traits_7 %} | ||
| {% tab 'Scala 2 and 3' %} | ||
| ```scala | ||
| val s = new MyService("ComposedService") with GreetingService with TranslationService |
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Intuitively, after seeing the syntax used above, someone could expect this to be defined in Scala 3 as:
val s = MyService("ComposedService") with GreetingService, TranslationService
It seems like only the Scala 2 syntax is accepted, though.
gkepka
commented
Dec 12, 2024
| {% tabs fun-partial-5 class=tabs-scala-version%} | ||
| {% tab 'Scala 2' %} | ||
| ```scala | ||
| doubledOdds.applyOrElse(4, (i: Int) => i + 1) // 5 |
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A small fix which I omitted last time somehow.
gkepka
commented
Dec 12, 2024
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| ### Overriding an implemented method | ||
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| A class can also override a method that is defined in a trait. Here is an example: |
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This covers both Overriding an implemented method and Mixing in multiple traits that have behaviors parts from the Scala 2 version.
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