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Kotlin Programming: The Big Nerd Ranch Guide, First Edition
book

Kotlin Programming: The Big Nerd Ranch Guide, First Edition

by Josh Skeen, David Greenhalgh
July 2018
Intermediate to advanced content levelIntermediate to advanced
400 pages
12h 14m
English
Big Nerd Ranch Guides
Content preview from Kotlin Programming: The Big Nerd Ranch Guide, First Edition

when Expressions

The when expression is another control flow mechanism available in Kotlin. Like if/else, the when expression allows you to write conditions to check for and will execute corresponding code when the condition evaluates as true. when provides a more concise syntax and is an especially good fit for conditionals with three or more branches.

Suppose that in NyetHack, players can be members of several different fantasy races, like orc or gnome, and those fantasy races ally with each other in factions. This when expression takes in a fantasy race and returns the name of the faction to which it belongs:

 val race = "gnome" val faction = when (race) { "dwarf" -> "Keepers of the Mines" "gnome" -> "Keepers of the Mines" "orc" ...
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Publisher Resources

ISBN: 9780135165188