public static void MainFunc()
{
int[] array = new int[] { 1, 2, -5, -7, 0, 3, -10, 4 };
Console.WriteLine("Usual Method:");
PrintPositiveNumber(array);
Console.WriteLine();
Console.WriteLine("Method with delegate:");
PrintPositiveNumberViaDelegate(array, IsPositiveNumber);
Console.WriteLine();
Console.WriteLine("Method with anonymous delegate:");
IsPositiveNumberDelegate isPositiveNumberAnonymous = delegate(int item)
{
return(item >= 0);
};
PrintPositiveNumberViaAnonymousDelegate(array, isPositiveNumberAnonymous);
Console.WriteLine();
Console.WriteLine("Method with Lambda:");
PrintPositiveNumberViaDelegate(array, item => item >= 0);
Console.WriteLine();
Console.WriteLine("Method with Linq:");
PrintPostiveNumberViaLinq(array);
Console.WriteLine();
Console.ReadKey();
}
private static void PrintPositiveNumberViaAnonymousDelegate(int[] array, IsPositiveNumberDelegate func)
{
if (func == null)
{
throw new ArgumentException("Empty delegate");
}
foreach (var item in array)
{
if (func(item))
{
Console.WriteLine(item);
}
}
}
