How to understand Anorm parser?

Question

From http://www.playframework.org/documentation/2.0/ScalaTodoList

What does "~" do and why don't I need a dot in front of the map?

val task = { get[Long]("id") ~ get[String]("label") map { case id~label => Task(id, label) } } 

Thanks for your help.

Answer 1

The ~ operator ~ inspired by Scala parser combinators ; it allows you to extract two column values ​​from a row.

There is no point to map , because in Scala you do not need to write points .