Scala example source code file (richs.scala)

This example Scala source code file (richs.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

iterator, richchartest1, richstringtest1, richstringtest2, richstringtest2, richstringtest3, richstringtest4, richstringtest6, richtest, richtest, string, test, test, unit

The Scala richs.scala source code

trait RichTest {
  val s1 = """abc"""
  val s2 = """abc\txyz\n"""
  val s3 = """abc
              xyz"""
  val s4 = """abc
              |xyz"""
  val s5 = """abc
              #xyz"""
  def getObjectName: String = {
    val cn = this.getClass().getName()
    cn.substring(0, cn.length-1)
  }
  def length[A](it: Iterator[A]) = it.toList length
  def length[A](it: Iterable[A]) = it.toList length
  def run: Unit
}
object RichCharTest1 extends RichTest {
  def run {
    println("\n" + getObjectName + ":")
    println('\40'.isWhitespace)
    println('\011'.isWhitespace)
    println('1'.asDigit == 1)
    println('A'.asDigit == 10)
  }
}
// object RichCharTest2 extends RichTest {
//   case class C(s: String) {
//     private val it = s.iterator
//     private var c: Char = _
//     def ch(): Char = c
//     def nextch(): Unit = { c = if (it.hasNext) it.next else ';' }
//     def err(msg: String) = println(msg)
//     nextch()
//   }
//   def run {
//     println("\n" + getObjectName + ":")
//     val c1 = C("x4A;")
//     val s1 = xml.Utility.parseCharRef(c1.ch, c1.nextch, c1.err)
//     val c2 = C("74;")
//     val s2 = xml.Utility.parseCharRef(c2.ch, c2.nextch, c2.err)
//     println(s1 == s2)
//   }
// }
object RichIntTest extends RichTest {
  private val n = 10
  private val m = -2
  def run {
    println("\n" + getObjectName + ":")
    println(length(0 until n))
    println(length(0 to n))
    println(length(m until n))
    println(length(m to n))
    println(length(n until m))
    println(length(n to m))

    println(16.toBinaryString) // should be "10000"
    println(16.toHexString)    // should be "10"
    println(16.toOctalString)  // should be "20"

    println(65537.toHexString) // should be "10001"
    println((-1).toHexString)  // should be "ffffffff"
  }
}
object RichStringTest1 extends RichTest {
  def run {
    println("\n" + getObjectName + ":")
    println("s1: " + s1)
    println("s2: " + s2)
    println("s3: " + s3)
    println("s4: " + s4)
    println("s5: " + s5)
  }
}
object RichStringTest2 extends RichTest {
  def run {
    println("\n" + getObjectName + ":")
    Console.print("s1: "); s1.lines foreach println
    Console.print("s2: "); s2.lines foreach println
    Console.print("s3: "); s3.lines foreach println
    Console.print("s4: "); s4.lines foreach println
    Console.print("s5: "); s5.lines foreach println
  }
}
object RichStringTest3 extends RichTest {
  def run {
    println("\n" + getObjectName + ":")
    println("s1: " + s1.stripLineEnd)
    println("s2: " + s2.stripLineEnd)
    println("s3: " + s3.stripLineEnd)
    println("s4: " + s4.stripLineEnd)
    println("s5: " + s5.stripLineEnd)
  }
}
object RichStringTest4 extends RichTest {
  def run {
    println("\n" + getObjectName + ":")
    println("s1: " + s1.stripMargin)
    println("s2: " + s2.stripMargin)
    println("s3: " + s3.stripMargin)
    println("s4: " + s4.stripMargin)
    println("s5: " + s5.stripMargin)
  }
}
object RichStringTest5 extends RichTest {
  def run {
    println("\n" + getObjectName + ":")
    println("s1: " + s3.stripMargin('#'))
    println("s2: " + s3.stripMargin('#'))
    println("s3: " + s3.stripMargin('#'))
    println("s4: " + s4.stripMargin('#'))
    println("s5: " + s5.stripMargin('#'))
  }
}
object RichStringTest6 extends RichTest {
  def run {
    println("a:b:c:d".split(':').toList)
    println("a.b.c.d".split('.').toList)
    println("a$b$c$d".split('$').toList)
    println("a^b^c^d".split('^').toList)
    println("a\\b\\c\\d".split('\\').toList)
    println("a:b:c.d".split(Array(':', '.')).toList)
    println("a:b.c$d".split(Array(':', '.', '$')).toList)
  }
}
/** xxx */
object Test {
  def main(args: Array[String]) {
    RichCharTest1.run
    //RichCharTest2.run
    RichIntTest.run
    RichStringTest1.run
    RichStringTest2.run
    RichStringTest3.run
    RichStringTest4.run
    RichStringTest5.run
    RichStringTest6.run
  }
}