Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
776 views
in Technique[技术] by (71.8m points)

scala - Using .tupled method when companion object is in class

I am in the process of migrating from Slick to Slick 2, and in Slick 2 you are meant to use the tupled method when projecting onto a case class (as shown here http://slick.typesafe.com/doc/2.0.0-RC1/migration.html)

The problem is when the case class has a companion object, i.e. if you have something like this

case class Person(firstName:String, lastName:String) {

}

Along with a companion object

object Person {
  def something = "rawr"
}

In the same scope, the tupled method no longer works, because its trying to run tupled on the object, instead of the case class.

Is there a way to retrieve the case class of Person rather than the object, so you can call tupled properly?

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

You can also write

(Person.apply _).tupled

to avoid repeating the types.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...