change to func

gistfile1.scala

 def assertArray(b1: Array[Byte], b2: Array[Byte]) {
    if (b1 == null && b2 == null) return;
    else if (b1 != null && b2 != null) {
      if (b1.length != b2.length) throw new AssertionError("b1.length != b2.length")
      else {
        for (i <- b1.indices) {
          if (b1(i) != b2(i)) throw new AssertionError("b1(%d) != b2(%d)".format(i, i))
        }
      }
    } else {
      throw new AssertionError("b1 is null while b2 is not, vice versa")
    }
  }