Lambda(람다식)

using System.Xml;

namespace CSharp1
{
    enum ItemType
    {
        Weapon,
        Armor,
        Amulet,
        Ring
    }
    enum Rarity
    {
        Normal,
        Uncommon,
        Rare
    }

    class Item
    {
        public ItemType itemType;
        public Rarity Rarity;
    }


    class Program
    {
        static List<Item> _items = new List<Item>();
        static Item FindItem(Func<Item,bool> selector)
        {
            foreach(Item item in _items)
            {
                if(selector(item))
                    return item;
            }
            return null;
        }
        static void Main(string[] args)
        {
            _items.Add(new Item() { itemType = ItemType.Weapon, Rarity = Rarity.Normal});
            _items.Add(new Item() { itemType = ItemType.Armor, Rarity = Rarity.Uncommon});
            _items.Add(new Item() { itemType = ItemType.Ring, Rarity = Rarity.Rare});
            //Lambda : 일회용 함수를 만드는데 사용하는 문법이다.

            //Anonymous Function 무명 함수 /익명 함수
            //Item item = FindItem(delegate(Item item) { return item.itemType == ItemType.Weapon; }); 
            //람다식 일회성 함수
            //delegate를 직접 선언하지 않아도, 이미 만들어지 애들이 존재한다.
            //반환타입이 있을 경우 Func
            //반환타입이 없을 경우 Action
            Item item = FindItem((Item item) =>  { return item.itemType == ItemType.Weapon; });

        }
    }
}