Why is appending to a list bad?

Question

I\'ve recently started learning scala, and I\'ve come across the :: (cons) function, which prepends to a list.
In the book \"Programming in Scala\" it state

Answer 1

Prepending is faster because it only requires two operations:

1. Create the new list node
2. Have that new node point to the existing list

Appending requires more operations because you have to traverse to the end of the list since you only have a pointer to the head.

I've never programmed in Scala before, but you could try a List Buffer