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seraphr/repl.scala

Created January 22, 2015 11:26
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repl.scala
scala> case class Base(id: String, data: String)
defined class Base
scala> case class Merged(id: String, dataList: Seq[String])
defined class Merged
scala>
scala> val tSeq = Seq(Base("c", "c2"), Base("a", "a1"), Base("c", "c3"), Base("a", "a2"), Base("b", "b"), Base("c", "c1"))
tSeq: Seq[Base] = List(Base(c,c2), Base(a,a1), Base(c,c3), Base(a,a2), Base(b,b), Base(c,c1))
scala> tSeq.groupBy(_.id).map {
| case (id, bases) => Merged(id, bases.map(_.data))
| }
res0: scala.collection.immutable.Iterable[Merged] = List(Merged(b,List(b)), Merged(a,List(a1, a2)), Merged(c,List(c2, c3, c1)))
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