private void printMenu(Iterator iterator)
{
while (iterator.hasNext())
{
MenuItem menuItem = (MenuItem)iterator.next();
Console.WriteLine(menuItem.getName() + ", ");
Console.WriteLine(menuItem.getPrice() + " -- ");
Console.WriteLine(menuItem.getDescription());
}
}
static void Main(string[] args)
{
Aggregate a = new Aggregate();
a[0] = "Item A";
a[1] = "Item B";
a[2] = "Item C";
a[3] = "Item D";
Iterator i = new Iterator(a);
object item = i.First();
while (item != null)
{
Console.WriteLine(item);
item = i.Next();
}
}
private static void Main()
{
var collection = new Collection();
for (int i = 0; i < 10; i++)
{
collection[i] = new Item($"Item {i}");
}
// create iterator
var iterator = new Iterator(collection)
{
Step = 2
};
Console.WriteLine("Iterating over collection: ");
for (Item item = iterator.First(); !iterator.IsDone; item = iterator.Next())
{
Console.WriteLine(item.Name);
}
}
static void Main(string[] args)
{
var a = new Aggregate<string>();
a[0] = "Item A";
a[1] = "Item B";
a[2] = "Item C";
a[3] = "Item D";
var i = new Iterator<string>(a);
var item = i.First();
while (item != null)
{
Console.WriteLine(item);
item = i.Next();
}
var infinite = Infinite.FromValue("hello world!");
foreach (string str in infinite)
Console.WriteLine(str);
}
static void Main(string[] args)
{
/*
*
* Aggregate 集合接口 对应 Iterator 迭代器接口
* BookShelf 实现了Aggregate的具体集合 对应 BookShelfIterator实现了Iterator的具体迭代器
* BookShelfIterator是知道BookShelf的具体实现的
*
* 使用时是面向接口变成 Aggregate 和 Iterator
* Iterator it=bookShelf.iterator();
* while (it.HasNext())
*{
* Book book = (Book)it.Next();
* Console.WriteLine(book.GetName());
*}
*/
BookShelf bookShelf = new BookShelf(4);
bookShelf.AppendBook(new Book("Around the World in 80 Days"));
bookShelf.AppendBook(new Book("Bible"));
bookShelf.AppendBook(new Book("Cinderella"));
bookShelf.AppendBook(new Book("Daddy-Long-Legs"));
Iterator it = bookShelf.iterator();
while (it.HasNext())
{
Book book = (Book)it.Next();
Console.WriteLine(book.GetName());
}
NewBookShelf newBookShelf = new NewBookShelf();
newBookShelf.AppendBook(new Book("Around the World in 80 Days"));
newBookShelf.AppendBook(new Book("Bible"));
newBookShelf.AppendBook(new Book("Cinderella"));
Iterator newIt = newBookShelf.iterator();
//当BookShelf与BookShelfIterator代码发生变化时，便利的代码并没有发生变化
while (newIt.HasNext())
{
Book book = (Book)newIt.Next();
Console.WriteLine($"New {book.GetName()}");
}
//
List <Book> list = new List <Book>();
list.Add(new Book("Around the World in 80 Days"));
list.Add(new Book("Bible"));
list.Add(new Book("Cinderella"));
foreach (var bk in list)
{
Console.WriteLine($"List {bk.GetName()}");
}
Console.ReadKey();
}