src/main/scala/xyz/driver/common/utils/MapOps.scala


1
2
3
4
5
6
7
8
9
10

package xyz.driver.common.utils

final class MapOps[K, V](val self: Map[K, V]) extends AnyVal {
  def swap: Map[V, Set[K]] = {
    self
      .toList
      .groupBy { case (_, v) => v }
      .mapValues(_.map { case (k, _) => k }.toSet)
  }
}