public static void Main()
{
// testing generic DoublyLinkedList<T>
DoublyLinkedList <int> listInt = new DoublyLinkedList <int>();
Console.WriteLine(listInt.Count); // 0
Console.WriteLine(listInt.Head == null ? "null" : listInt.Head.Value.ToString()); // null
Console.WriteLine(listInt.Head == null ? "null" : listInt.Head.Previous == null ? "null" : listInt.Head.Previous.Value.ToString()); // null
Console.WriteLine(listInt.Head == null ? "null" : listInt.Head.Next == null ? "null" : listInt.Head.Next.Value.ToString()); // null
// testing AddFirst(int element)
listInt.AddFirst(21);
listInt.AddFirst(5);// 5 21
// testing AddLast(int element)
listInt.AddLast(5);
listInt.AddLast(21);// 5 21 5 21
// testing RemoveFirst()
Console.WriteLine(listInt.RemoveFirst());// 5
// testing RemoveLast()
Console.WriteLine(listInt.RemoveLast());// 21
// testing ForEach(Action<int>)
listInt.ForEach(Console.WriteLine);
// testing ToArray()
int[] arrInt = listInt.ToArray();
Console.WriteLine(string.Join(' ', arrInt));// 21 5
// testing generic DoublyLinkedList<T>
DoublyLinkedList <string> listStr = new DoublyLinkedList <string>();
Console.WriteLine(listStr.Count); // 0
Console.WriteLine(listStr.Head == null ? "null" : listStr.Head.Value.ToString()); // null
Console.WriteLine(listStr.Head == null ? "null" : listStr.Head.Previous == null ? "null" : listStr.Head.Previous.Value); // null
Console.WriteLine(listStr.Head == null ? "null" : listStr.Head.Next == null ? "null" : listStr.Head.Next.Value); // null
// testing AddFirst(int element)
listStr.AddFirst("Pesho");
listStr.AddFirst("Gosho");// Gosho Pesho
// testing AddLast(int element)
listStr.AddLast("Peter");
listStr.AddLast("George");// Gosho Pesho Peter George
// testing RemoveFirst()
Console.WriteLine(listStr.RemoveFirst());// Gosho
// testing RemoveLast()
Console.WriteLine(listStr.RemoveLast());// George
// testing ForEach(Action<int>)
listStr.ForEach(Console.WriteLine);
// testing ToArray()
string[] arrStr = listStr.ToArray();
Console.WriteLine(string.Join(' ', arrStr));// Pesho Peter
// testing foreach-ability
foreach (var item in listStr)
{
Console.WriteLine(item);
}
Console.WriteLine(string.Join(", ", listStr));
foreach (var item in listInt)
{
Console.WriteLine(item);
}
Console.WriteLine(string.Join(", ", listInt));
}
