How to add data to a TrieMap[Long,List[Long]] in Scala

Question

i have this:

val vertexIdListPartitions: TrieMap[Long, List[Long]] = TrieMap()

i need to add List(3) at vertexIdListPartitio

Answer 1

Mutable collections have the update() method for this.

vertexIdListPartitions.update(3L, List(3))  //res0: Unit = ()
vertexIdListPartitions  //res1: TrieMap[Long,List[Long]] = TrieMap(3 -> List(3))