I have a map that has SomeClass -> Double
I want to get the SomeClass
associated with the smallest value. How do I go about doing this? Ties do not
Use minBy:
Map("a" -> 3.0, "b" -> 1.0, "c" -> 2.0).minBy(_._2)._1
This gives "b"
as expected.
Starting Scala 2.13
, you might prefer minByOption in order to also safely handle empty Map
s:
Map("a" -> 3.0, "b" -> 1.0, "c" -> 2.0).minByOption(_._2).map(_._1)
// Some("b")
Map[String, Double]().minByOption(_._2).map(_._1)
// None
And you can always decide to fallback on a default value when the Map is empty:
Map[String, Double]().minByOption(_._2).map(_._1).getOrElse("")