Question

I am having some strange compiler errors that I cannot seem to understand. Below is the relevant code:

class A {

  var x = List[B]()

  def func = {
    val temp = x(0)
    x = x tail
    temp
  }

}

I simply want to remove the first element from a list and return it. However, I am getting an error saying “type mismatch: found B: required Int”. I cannot figure out for the life of me why it wants an Int.

Thanks in advance for any help!

Answer 1

What is the type B? Did you mean Int?

To get the first element you can use head. To get the rest of the list you can use tail. The dot operator in Scala is optional.

  def func = {  
    val temp = x.head
    x = x.tail
    temp
  }