January 2018
Intermediate to advanced
434 pages
14h 1m
English
Content preview from Kotlin Programming Cookbook
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If you are using Kotlin versions prior to 1.1, you'll need to implement the subclasses inside the sealed class, much like this:
sealed class ToastOperation { object ShowErrorToast:ToastOperation() class ShowMessageToast(val message:String):ToastOperation()}
Note that you can use the preceding way in the new version of Kotlin as well.
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