I did something super ugly and casted everything to things like Quantity[Nothing]. It's ugly, and it works, but in essence it's exactly what I mean: I know the dimensions match (I grouped, so they must!) and I don't care what they are, just process them.
Color as a dimension and Srgb, CIELab, HSV, etc as units
2 replies
scala> squants.thermal.Kelvin(300).toCelsiusScale
res9: Double = 26.850000000000023
GBP(5000).toFormattedString gives me £5000. How do I read that back? GBP(5000).toString gives me 5E3 GBP. How do I read that back? I can read 5000 GBP but the other two seem to fail. I can't figure the trick from the docs.
ok, I forked and cloned and added this test to MoneySpec
it should "read its own output from formatted strings given an implicit MoneyContext in scope" in {
implicit val moneyContext = MoneyContext(USD, defaultCurrencySet, Nil)
Money("500 USD").get should be(USD(500))
Money(Money("500 USD").toString) should be(USD(500))
}Gives
Failure(squants.QuantityParseException: Unable to parse Money:Success(5E+2 USD)) was not equal to 5E+2 USD def apply(s: String)(implicit fxContext: MoneyContext): Try[Money] = {
val regex = ("([-+]?[0-9]*\\.?[0-9]+) *(" + fxContext.currencies.map(_.code).reduceLeft(_ + "|" + _) + ")").r
s match {
case regex(value, currency) ⇒ Currency(currency).map(Money(value.toDouble, _))
case _ ⇒ Failure(QuantityParseException("Unable to parse Money", s))
}
}
folks, is this a bug or a feature? :D
test("Bug reproduction - squants.toString depends on ScalaOps.format, which down the stack uses the Locale") {
IO {
val quantity = squants.Seconds(0.0d)
java.util.Locale.setDefault(java.util.Locale.GERMAN)
val quantityGerman = quantity.toString // = 0,0 s
java.util.Locale.setDefault(java.util.Locale.ENGLISH)
val quantityEnglish = quantity.toString // 0.0 s
scala.Console.println(quantityGerman, quantityEnglish)
assert(clue(quantityEnglish) != clue(quantityGerman))
}
}Basically, I was serializing w/ .toString in some bit of code, then trying to use .parseString to read in another bit of code. This caused a surprising crash out of the blue :smile:
The difference in formatting is given by the use of the format method from StringOps (yay! hidden side effects)
https://github.com/typelevel/squants/blob/master/jvm/src/main/scala/squants/Platform.scala#L12
And the parsing uses only . in its regex:
https://github.com/typelevel/squants/blob/master/shared/src/main/scala/squants/Dimension.scala#L75
I have a fork for the repo here (https://github.com/garyKeorkunian/squants-generic) where I was attempting to remodel the library to support that.
I haven't had time to work on it, but it should at least provide some inspiration towards an elegent solution.
Hi guys, does anyone have experience using the squants lib with Slick? I am trying to add two columns of Rep[Length] together. The thing I'm running into seems like an implicit string conversion is being applied, messing things up. The first value (bow) is lifted and read as Rep[Length], the second (stern) however has anyOptionLift(primitiveShape(stringColumnType)) implicit added to it. Both bow and stern in the for comprehension are read as Rep[Length] but the yield uses the any2stringadd implicit causing a String expected error.
val length: Rep[Option[Length]] = for {
bow <- nearbyVessel.distanceToBow
stern <- nearbyVessel.distanceToStern
} yield bow + stern
AI have also asked the slick room but waiting on a response so any suggestions on how I can solve this would be greatly appreciated, cheers.
