How can I sort a dictionary by key in Scala?

Question

It is easy to sort a Map by keys or values in Python (this question for example).

I would like to do the same thing in Scala, lets say I have a dictionary like:

val A= Map(0 -> 1.0, 3 -> 5.0,2->7.0)

I would like to get a List of tuples that correspond to the sorted Map by keys:

val A_sorted= List((0,1.0),(2,7.0),(3,5.0))

Thanks!

Answer 1

Map(0 -> 1.0, 3 -> 5.0,2->7.0).toList.sortBy(_._1)

res1: List[(Int, Double)] = List((0,1.0), (2,7.0), (3,5.0))