//Takes the delegate that allows us do the shortened comparison call
private static List <int> FilterArray(int[] intArray, delegateName predicate)
{
var result = new List <int>();
foreach (var item in intArray)
{
if (predicate(item))
{
result.Add(item);
}
}
return(result);
}
static void Main(string[] args)
{
int[] numbers = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
//delegateName evenpredicate = IsEven;
delegateName evenpredicate = number => number % 2 == 0;
Console.WriteLine($"Call isEven using a delegate variable: {evenpredicate(25)}");
List <int> evenNumbers = FilterArray(numbers, evenpredicate);
DisplayList("Used a predicate to filter numbers", evenNumbers);
List <int> oddNumbers = FilterArray(numbers, number => { return(number % 2 != 0); });
DisplayList("Used a predicate to filter numbers", oddNumbers);
List <int> overFive = FilterArray(numbers, number => { return(number > 5); });
DisplayList("Used a predicate to filter numbers", overFive);
var values = new List <int> {
3, 5, 3, 1, 2, 3, 4, 7, 88
};
values.Display();
Console.WriteLine($"Min: {values.Min()}");
Console.WriteLine($"Max: {values.Max()}");
Console.WriteLine($"Average: {values.Average()}");
Console.WriteLine($"Sum: {values.Sum()}");
Console.WriteLine($"Sum implemented with aggregates: {values.Aggregate(0, (x, y) => x + y)}");
Console.WriteLine($"Unknown1: {values.Aggregate(0, (x, y) => x + y*y)}");
Console.WriteLine($"Unknown2: {values.Aggregate(1, (x, y) => x * y ) }");
//Filters then orders
values.Where(value => value % 2 == 0).OrderBy(value => value).Display();
}
