Kotlin Programming by Josh Skeen & David Greenhalgh

Author:Josh Skeen & David Greenhalgh [Skeen, Josh]
Language: eng
Format: epub
Tags: Big Nerd Ranch Guides, COM051010, Kotlin Programming, Android Programming
ISBN: 9780135162361
Publisher: Pearson Education
Published: 2018-06-22T04:00:00+00:00

This code compiles, thanks to the also standard function. Instead of referring to the class property, it, the argument to also, is a local variable that exists only within the scope of the anonymous function. Therefore, the it variable is guaranteed to not be changed by another part of your program. The smart cast issue is avoided entirely, because instead of dealing with the original nullable property, this code uses a read-only, non-nullable local variable (since also is called after the safe call operator: weapon?.also).

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