Scalaでサマリ

App.scala

object App {
  def main(args : Array[String]) {
    case class Structure(campaign:String,creative:String,imp:Int,click:Int,conv:Int,cost:Int)

    val structures = List(
      Structure("testcampaign001","testcreative001",1,1,1,1),
      Structure("testcampaign002","testcreative004",1,1,1,1),
      Structure("testcampaign003","testcreative005",1,1,1,1),
      Structure("testcampaign004","testcreative003",1,1,1,1),
      Structure("testcampaign004","testcreative001",1,1,1,1),
      Structure("testcampaign004","testcreative002",1,1,1,1)
    )

    val result = structures.groupBy(s => (s.campaign, s.creative)).map {
      case (key, ss) =>
        ss.reduce((a,b) => a.copy(
        imp = a.imp + b.imp,
        click = a.click + b.click,
        conv = a.conv + b.conv,
        cost = a.cost + b.cost))
    }.toList.sortBy (s => (s.campaign,s.creative))
  }
}