static void PrintCollection(IMyEnumerator <object> coll, int count)
{
for (int i = 0; i < count; i++)
{
Console.WriteLine(coll.GetItem(i));
}
}
static void Main(string[] args)
{
//使用接口IMyEnumerable代替MyList
IMyEnumerable list = new MyList();
//得到迭代器，在循环中针对迭代器编码，而不是集合MyList
IMyEnumerator enumerator = list.GetEnumerator();
for (int i = 0; i < list.Count; i++)
{
object current = enumerator.Current;
enumerator.MoveNext();
}
while (enumerator.MoveNext())
{
object current = enumerator.Current;
}
//ICollection<object> list = new List<object>();
//IEnumerator enumerator = list.GetEnumerator();
//for (int i = 0; i < list.Count; i++)
//{
// object current = enumerator.Current;
// enumerator.MoveNext();
//}
//while (enumerator.MoveNext())
//{
// object current = enumerator.Current;
//}
}
public IMyEnumerator GetEnumerator()
{
if (myEnumerator == null)
{
myEnumerator = new MyEnumerator(this);
}
return(myEnumerator);
}
private bool OverlappedWithAny(IMyEnumerator <GridSquare> squares)
{
for (var square = squares.First(); square != null; square = squares.Next())
{
if (square.Rect.IsOverlappingWith(Rect))
{
return(true);
}
}
return(false);
}
static void Main(string[] args)
{
var seq = new FibonacciSequence(7);
IMyEnumerator <int> iter = seq;
while (iter.MoveNext())
{
Console.Write(iter.Current + " ");
}
iter.Reset();
Console.ReadLine();
}
static void Main()
{
var strings = new MyCollection <string>();
strings.AddItem("One");
strings.AddItem("Two");
IMyEnumerator <string> collStrings = strings;
IMyEnumerator <object> collObjects = collStrings; // Ковариантность в действии
PrintCollection(collObjects, 2);
Console.ReadKey();
}
