10 lines
221 B
Scala
10 lines
221 B
Scala
|
import collection.mutable.{ Stack => Stak }
|
||
|
|
|
||
|
|
class Stack[T] extends Stak[T] {
|
||
|
|
override def pop: T = {
|
||
|
|
if (this.length == 0) error("Can't Pop from an empty Stack.")
|
||
|
|
else super.pop
|
||
|
|
}
|
||
|
|
def peek: T = this.head
|
||
|
|
}
|