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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

Combat in NyetHack

Adding combat to NyetHack will put to use all that you have learned about object-oriented programming.

Each room in NyetHack will contain a monster for your hero to vanquish in the most graphic way that you know how: by nullifying it.

Add a monster property of nullable type Monster? to the Room class, and initialize it by assigning it a Goblin. Update Room’s description to let the player know whether the room has a monster to fight.

Listing 16.8  Adding a monster to each room (Room.kt)

open class Room(val name: String) {
    protected open val dangerLevel = 5
    var monster: Monster? = Goblin()

    fun description() = "Room: $name\n" +
            "Danger level: $dangerLevel\n" +
            "Creature: ${monster?.description ?: "none."}" open ...
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Publisher Resources

ISBN: 9780135165188