apply is a magic Scala method. There is no need to call apply explicitly to execute it. And this is part of the tool that the case class use.
This SKB might be a bit longer than previous ones.
apply can be called like any other method ( Person.apply(...) ) but it can be used without calling its name explicitely ( Person(...) ). And that's it.
If you want to learn more, continue reading.
In fact, you could implement a function yourself:
val add = new Function2[Int, Int, Int] {
def apply(a: Int, b: Int): Int = a + b
}
val result = add(1, 2)
assert(result == 3)
Try and copy it above in the editor.
You could also implement if yourself ! Try it by yourself before looking at Scastie.
Solution: Scastie (owFP4D18R6yjrDJoPLu7Bg)
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