infix, prefix, and postfix operators

gistfile1.scala

object ScalaHackSession {
  //method calls instead of infix operators
  (1).+(1)                                        //> res0: Int(2) = 2
  1. + (1)                                        //> res1: Double(2.0) = 2.0
  "Hello, Scala".indexOf("a")                     //> res2: Int = 9
  "Hello, Scala".indexOf("a", 10)                 //> res3: Int = 11

  //method calls instead of unary prefix operators
  true.unary_!                                    //> res4: Boolean = false
  (1 - 2).unary_+                                 //> res5: Int = -1
  (1 - 2).unary_-                                 //> res6: Int = 1

  //method call instead of unary postfix operator
  "Hello, Scala".toLowerCase                      //> res7: String = hello, scala
  "Hello, Scala".toUpperCase                      //> res8: String = HELLO, SCALA
}