Iterator的int是否應該為string?

[zamhsu]

此處的型別應該是string
經測試，使用int會出例外狀況

Design-Pattern/IteratorPattern/Program.cs

Line 19 in 5ae4ecc

int i = (int)iterator.GetCurrent();

因為ConcreteList內部的_collection是string陣列

Design-Pattern/IteratorPattern/Iterator.cs

Line 30 in 5ae4ecc

_collection = new string[] { "A", "B", "C", "D" };