/// <summary>
/// Search of a positive numbers in the collection with using delegate <typeparamref name="T"/>
/// </summary>
/// <typeparam name="T">The type of element of the array</typeparam>
/// <param name="collection">Current collection</param>
/// <param name="func">current condition search</param>
/// <returns>New dynamic array with positive numbers</returns>
public List <T> SearchThroughTheDelegate <T>(IEnumerable <T> collection, ConditionSeach <T> func) where T : IComparable <T>
{
List <T> newArray = new List <T>();
foreach (T item in collection)
{
if (func != null && func.Invoke(item))
{
newArray.Add(item);
}
}
return(newArray);
}
/// <summary>
/// Create Dynamic Array and Compare 5 ways to work with them
/// </summary>
public static void Demo()
{
List <int> array = new List <int>();
Random random = new Random();
var sw = new Stopwatch();
for (int i = 0; i < 10; i++)
{
array.Add(random.Next(-100, 100));
}
SeachAPositiveNumbers methods = new SeachAPositiveNumbers();
var time = new HashSet <long>();
for (int i = 0; i < 11; i++)
{
sw.Start();
methods.PositiveNumbers(array);
sw.Stop();
time.Add(sw.ElapsedTicks);
}
Console.WriteLine($"Just method = {time.ElementAt(time.Count / 2)}");
time.Clear();
ConditionSeach <int> func = IsPositive;
for (int i = 0; i < 11; i++)
{
sw.Start();
methods.SearchThroughTheDelegate(array, func);
sw.Stop();
time.Add(sw.ElapsedTicks);
}
Console.WriteLine($"Seach with delegate = {time.ElementAt(time.Count / 2)}");
time.Clear();
ConditionSeach <int> funcAnon = delegate(int number)
{
if (number.GetHashCode() > 0.GetHashCode())
{
return(true);
}
return(false);
};
for (int i = 0; i < 11; i++)
{
sw.Start();
methods.SearchThroughTheDelegate(array, funcAnon);
sw.Stop();
time.Add(sw.ElapsedTicks);
}
Console.WriteLine($"Seach with anonymous delegate = {time.ElementAt(time.Count / 2)}");
time.Clear();
ConditionSeach <int> funcLambda = number => number.GetHashCode() > 0.GetHashCode();
for (int i = 0; i < 11; i++)
{
sw.Start();
methods.SearchThroughTheDelegate(array, funcLambda);
sw.Stop();
time.Add(sw.ElapsedTicks);
}
Console.WriteLine($"Seach with lambda delegate = {time.ElementAt(time.Count / 2)}");
time.Clear();
for (int i = 0; i < 11; i++)
{
sw.Start();
array.Where(number => number.GetHashCode() > 0.GetHashCode());
sw.Stop();
time.Add(sw.ElapsedTicks);
}
int cout = time.Count();
Console.WriteLine($"Seach with linq delegate = {time.ElementAt(time.Count / 2)}");
}
