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