Lesson 20 - Equals(), clone() and data classes in Kotlin
In the previous lesson, Enumerated types and constants in Kotlin, we went over the enumerated types and
constants in Kotlin. In today's tutorial, we're going to focus on the
equals() method and introduce object cloning.
The equals() method
The equals() method is related to comparing objects. We already
know that we use it to compare strings. The == operator works for
standard data types, such as Int or Double, as we
would expect it to. However, when we try to compare 2 objects using
==, we'll get true only if we're comparing 2
references to the same object. If we create a class and 2 different
instances of that class, those are still 2 different objects. Their values are
the same, but the objects are not the same.
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In this tutorial, we'll override the equals() method so it can compare objects via their internal state. Then we'll explain cloning and data classes.
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