Hands-On Design Patterns with Kotlin

A lethal weapon

What is left for us is to see that with the new hierarchy, we can still do the exact same things:

val rifleman = Soldier(Rifle(), RegularLegs())val grenadier = Soldier(Grenade(), RegularLegs())val upgradedGrenadier = Soldier(GrenadePack(), RegularLegs())val upgradedRifleman = Soldier(MachineGun(), RegularLegs())val lightRifleman = Soldier(Rifle(), AthleticLegs())val lightGrenadier = Soldier(Grenade(), AthleticLegs())

Now, our hierarchy looks like this:

Infantry --> SoldierWeapon --> Rifle       --> MachineGun       --> Grenade       --> GrenadePack Legs --> RegularLegs     --> AthleticLegs

Much simpler to extend and also to comprehend. Unlike some other design patterns we discussed before, we didn't use any special language feature we didn't know ...