Using when with custom objects

In Kotlin, when is already so powerful but did you know you can also use custom objects in when? Amazing, right? Let's go about implementing it.

Getting ready

You need to install a preferred development environment that compiles and runs Kotlin. You can also use the command line for this purpose, for which you need Kotlin compiler installed, along with JDK. I am using the command line to compile and run my Kotlin code for this recipe.

How to do it...

Create a file and name it whenWithObject.kt, and then, let's try when with a custom object. In this example, we will create an object with some properties and try to match it in a when statement:

fun main(args: Array<String>) {
     val x = ob(2, true, 500)
     when(x){
         ob(2, true, 500) -> println("equals correct object")
         ob(12, false, 800) -> {
             println("equals wrong object")
         }
         else -> println("does not match any object")
     }
 }
data class ob(val value...