using System;
using System.Collections.Generic;
using System.Threading;
using System.Linq;

namespace IMJunior
{
    class Program
    {
        delegate bool Predicate(string item);

        delegate string Predicate2(string item);

        static void Main()
        {
            string[] words = { "Hello", "Temp", "Some", "Hesus" };

            foreach (var word in Where(words, (x) => x.StartsWith("H")))
            {
                Console.WriteLine(word);
            }
        }

        static void Foreach(string[] array, Predicate2 predicate)
        {
            List<string> result = new List<string>();
            foreach (var item in array)
            {
                result.Add(predicate(item));
            }

            array = result.ToArray();
        }

        static string[] Where(string[] array, Predicate predicate)
        {
            List<string> result = new List<string>();

            foreach (var item in array)
            {
                if (predicate(item))
                {
                    result.Add(item);
                }
            }

            return result.ToArray();
        }
    }
}