/// <summary>
/// Dequeues a specific animal type or the oldest animal.
/// </summary>
/// <param name="type">the Type of animal</param>
/// <returns>The oldest animal of the requested type</returns>
public Node <DateTime> Dequeue(string type = null)
{
if (type == "dog")
{
return(Dogs.Dequeue());
}
else if (type == "cat")
{
return(Cats.Dequeue());
}
else
{
return((Dogs.Peek().Data.CompareTo(Cats.Peek().Data) < 0)? Dogs.Dequeue() : Cats.Dequeue());
}
}
public Animal Dequeue(string pref)
{
if (pref.ToLower() == "cat")
{
if (Cats.Peek() != null)
{
return(Cats.Dequeue().Holds);
}
}
else if (pref.ToLower() == "dog")
{
if (Dogs.Peek() != null)
{
return(Dogs.Dequeue().Holds);
}
}
return(null);
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public Animal Dequeue()
{
if (Dogs.Peek() != null && Cats.Peek() != null)
{
return(Dogs.Peek().Serial < Cats.Peek().Serial ? Dogs.Dequeue().Holds : Cats.Dequeue().Holds);
}
else if (Dogs.Peek() == null && Cats.Peek() == null)
{
return(null);
}
else if (Dogs.Peek() == null)
{
return(Cats.Dequeue().Holds);
}
else
{
return(Dogs.Dequeue().Holds);
}
}