Quick Example

Following is an example showing how to update, view, and set values within nested data structures.
In this example we apply the first Lens three times in order to reach the leftmost element of the tupled instance:

import proptics.instances.all._
import proptics.syntax.all._

val leftmost = ((("hi!", 3), 2), 1).first.first.first

leftmost.view
// val res0: String = hi!

leftmost.set("Bye!")
// val res1: (((String, Int), Int), Int) = (((Bye!,3),2),1)

leftmost.over(_.toUpperCase)
// val res2: (((String, Int), Int), Int) = (((HI!,3),2),1)