scala is bad.

omg.scala

object Main {
  val s1 = Set[BigDecimal](-4.872401723124452E9, 0, 1.1752011936438014, 8.696374707602505E17, -1.1752011936438014)
  val s2 = Set[Double]    (-4.872401723124452E9, 0, 1.1752011936438014, 8.696374707602505E17, -1.1752011936438014)
  val s3: Set[BigDecimal] = s2 map (d => BigDecimal(d))

  def main(args: Array[String]): Unit = {
    /* false */ println(s1 == s2)
    /*  true */ println(s1 == s3)
    /* false */ println(s2 == s3)
    /*  true */ println(s1.toSeq.sorted == s2.toSeq.sorted)
    /*  true */ println(s1.toSeq.sorted == s3.toSeq.sorted)
    /*  true */ println(s2.toSeq.sorted == s3.toSeq.sorted)
    /*  true */ println("s1 forall: " + (s1 forall (x => s2 exists (y => x == y))))
    /*  true */ println("s2 forall: " + (s2 forall (x => s1 exists (y => x == y))))
  }
}

How about using scastie, so people can see the results

@nafg I get actually different results in scastie

http://scastie.org/21270