/* SCALA */

object SampleImplicits {

    // mention object to be extended only once
    implicit def stringWrapper(s: String) = new {

        def sort() = {
            val arr = s.toCharArray()
            java.util.Arrays.sort(arr)
            String.valueOf(arr)
        }

        def checksum() = s.map(_.toInt).fold(0)(_ + _)

        def toUpper() = s.toUpperCase()

    }

}

object Sample {

    def main(args: Array[String]) = {

        // use extensions where they are needed
        import SampleImplicits._

        val sorted = "Sort me!".sort()
        println(sorted)

        val summed = "Sum me!".checksum()
        println(summed)

        val string = "Upper me!".toUpper()
        println(string)

    }

}