Hands-On Design Patterns with Kotlin

One, two... many

We're back to our squads and platoons in our CatsCraft 2: Revenge of the Dogs strategy game.

As you may remember from the previous chapter, Squad consists of InfantryUnits:

interface InfantryUnitclass Squad(val infantryUnits: MutableList<InfantryUnit> =         mutableListOf()) {   }

Each squad should also get a commander now.

The commander of a squad called Sergeant is also an InfantryUnit:

class Squad(...) {    val commander = Sergeant()}class Sergeant: InfantryUnit

Please disregard the fact that our sergeant doesn't have a name and gets created on the fly. We're two days short of releasing this game and beating the competition. Names are not important now.

The platoon is a collection of squads, and it also has a commander, called ...