static void Main()
{
int[] arrFront = { 5, 4, 3, 2, 1 };
int[] arrBack = { 6, 7, 8, 9, 10 };
// create new Deque using these arrays
Deque <int> d = new Deque <int>(arrBack, arrFront);
// iterate from first to last
Console.Write("The Deque contains : ");
foreach (int i in d)
{
Console.Write("{0} ", i); // 1 to 10
}
Console.WriteLine();
// iterate from last to first
Console.Write("Or in reverse order : ");
foreach (int i in d.Reversed)
{
Console.Write("{0} ", i); // 10 to 1
}
Console.WriteLine();
// permanently reverse the order of the items
d.Reverse();
// iterate from first to last again
Console.Write("After permanent reversal : ");
foreach (int i in d)
{
Console.Write("{0} ", i); // 10 to 1
}
Console.WriteLine();
// add items at front
Console.WriteLine("Added 11 and 12 at the front");
d.AddRangeFirst(new int[] { 11, 12 });
// add item at back
Console.WriteLine("Added 0 at the back");
d.AddLast(0);
Console.WriteLine("The first item is : {0}", d.PeekFirst()); // 12
int num;
if (d.TryPeekLast(out num))
{
Console.WriteLine("The last item is : {0}", num); // 0
}
// pop last item
Console.WriteLine("Popped last item");
num = d.PopLast();
// pop first item
Console.WriteLine("Popped first item");
d.TryPopFirst(out num);
if (d.Contains(11))
{
// iterate again
Console.Write("The Deque now contains : ");
foreach (int i in d)
{
Console.Write("{0} ", i); // 11 to 1
}
Console.WriteLine();
}
// peek at last item
Console.WriteLine("The last item is : {0}", d.PeekLast()); // 1
// count items
Console.WriteLine("The number of items is : {0}", d.Count); // 11
// convert to an array
int[] ia = d.ToArray();
// reload to a new Deque adding all items at front so they'll now be reversed
d = new Deque <int>(null, ia);
Console.Write("The new Deque contains : ");
foreach (int i in d)
{
Console.Write("{0} ", i); // 1 to 11
}
Console.WriteLine("\nThe capacity is : {0}", d.Capacity);
d.TrimExcess();
Console.WriteLine("After trimming the capacity is now : {0}", d.Capacity);
// copy to an existing array
ia = new int[d.Count];
d.CopyTo(ia, 0);
// clear the Deque (No pun intended!)
d.Clear();
Console.WriteLine("After clearing the Deque is now empty : {0}", d.IsEmpty);
Console.WriteLine("The third element used to be : {0}", ia[2]);
Console.ReadKey();
}
