Passing functions in Scala, seen at https://code.scottshipp.com/2015/12/22/passing-functions-in-scala-or-how-scala-embarrasses-oo-languages-and-their-pretentious-strategy-pattern/

SuperHeroEscape.scala

object SuperHeroEscape extends App {

  def getFreeFromATrap(doSuperPower: String => Unit, trap: String) = {
    println()
    println(s"Oh no I'm trapped by ${trap}.")
    println(s"I will break free!")
    doSuperPower(trap)
  }
  
  def flyOut(trap: String) = println(s"I fly out of the ${trap} and into the sky!")
  def superStrength(trap: String) = println(s"With my super strength, I can break the ${trap} and escape!")
  def laserVision(trap: String) = println(s"My laser vision destroys ${trap} and I escape!")
  def invisibility(trap: String) = println(s"Using invisibility I evade the ${trap}!")
  
  
  getFreeFromATrap(flyOut, "quick sand")
  getFreeFromATrap(superStrength, "iron bars")
  getFreeFromATrap(laserVision, "a collapsed tunnel")
  getFreeFromATrap(invisibility, "armed guards")
  
}