.NET Lambda

Lambda概述

• Lambda表達式

• 表達式傳遞給委托類型

  del( i);
  Main([] args)
{
    del myDelegate = x => x * x;
     j = myDelegate(5); 
}

• 表達式樹類型

 System.Linq.Expressions;
 ConsoleApplication1
{
     Program
    {
          Main([] args)
        {
            Expression<del> myET = x => x * x;
        }
    }
}

• 標准查詢運算

  TResult Func<TArg0, TResult>(TArg0 arg0)

, > myFunc = x => x == 5;

 result = myFunc(4);

[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };

 oddNumbers = numbers.Count(n => n % 2 == 1);

 firstSmallNumbers = numbers.TakeWhile((n, index) => n >= index);

• 變量范圍