Hands-On Object-Oriented Programming with Kotlin

The equals() function ==

The data class provides a useful function called equals(), which compares each property of the two classes. It comes back as true if all the properties of both classes are the same, otherwise it comes back as false. Let's take a look at an example:

1. Declare a normal class, Person, and create two objects with similar values. Compare them with equal == operator:

class Person(var name : String, var age : Int, var height : Double)fun main(args: Array<String>) {    val abid = Person("Abid", 40, 6.0)    val khan = Person("Abid", 40, 6.0)    if(abid == khan) {         println("Both Persons are same")    } else {         println("Different persons")    }}

2. Run this code and verify the output. The output is Different persons, although the values of both ...