Question

For example to print everything I can do

list.foreach(println(_))

How would I do the equivalent of

list.foreach(println(_ + "mystring"))

Answer 1

In order to fix your second example you can name function argument like this:

list.foreach(x => println(x + "mystring"))

By the way, as alternative you can at first map your list and then print each element in it:

list map (_ + "mystring") foreach println

This will produce the same results.