private static void RunDemo2(int[] array)
{
Function_2method func = new Function_2method(IsPositive);
Console.WriteLine("***Demo of the second method (finding all positive (Condition gets by delegate instance.) elements of array). ***");
ShowArray(array, "Your random int array: ");
Console.WriteLine();
int[] result = FindSmthInIntArray1(array, func);
ShowArray(result, "All positive numbers of the above array :");
}
private static int[] FindSmthInIntArray1(int[] array, Function_2method predicate)
{
List <int> result = new List <int> {
};
if (predicate == null)
{
throw new ArgumentNullException(nameof(predicate));
}
for (int i = 0; i < array.Length; i++)
{
if (predicate(array[i]))
{
result.Add(array[i]);
}
}
return(result.ToArray());
}
