Created
February 1, 2014 12:05
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possible way to make easily updatable case class objects
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| trait Base[T] { | |
| val id: Option[String] | |
| def copyId(id: String): T | |
| } | |
| case class Test2(id: Option[String], other: String) extends Base[Test2] { | |
| def copyId(id: String) = copy(id=Some(id)) | |
| } | |
| def updateId[T <: Base[T]](obj: T, id: String) = obj.copyId(id) | |
| val y = Test2(None, "hmm") | |
| assert(updateId(y, "!!!") == Test2(Some("!!!"), "hmm")) |
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