Final tips

The following sections enlist a few final tips and tricks that you might find handy while working with the REPL.

Copying and pasting in the REPL

As a reminder, this feature introduced in Chapter 8, Essential Properties of Modern Applications – Asynchrony and Concurrency, makes it easy to execute a full code snippet at once in the REPL. For instance, the following lines of command illustrate how the copy and paste feature in REPL helps the easy execution of code:

scala> :paste
// Entering paste mode (ctrl-D to finish)

[Copy a code block from somewhere with ctrl-C/ctrl-V]

  case class Person(name:String)

  val me = Person("Thomas")
  val you = Person("Current Reader")
  
  val we = List(you,me).map(_.name).reduceLeft(_+" & "+_)
  val status = s"$we have fun with Scala"
  
[Once you are done with pasting the code block, press ctrl-D]

// Exiting paste mode, now interpreting.

defined class Person
me: Person = Person(Thomas)
you: Person = Person(Current Reader)
we: String...