Meter.scala:72: warning: a.Meter and Int are unrelated: they will never compare equal
  println("x == 1: "+(x == 1))
                        ^
2.0
4.0m
false
x.isInstanceOf[Meter]: true
x.hashCode: 1072693248
x == 1: false
x == y: true
a == b: true
testing native arrays
Array(1.0m, 2.0m)
1.0m
>>>1.0m<<< 1.0m
>>>2.0m<<< 2.0m