C# Predicate

using Predicate; public class Program { public static void Main(string[] args) { var yoshlar = new int[] {16,21,13,41,15,27,23}; var yosh = new List<int>(); yoshlar.KottaBollar(KattaBola) .ToList() .ForEach(System.Console.WriteLine); } public static bool KattaBola(int age) { return age > 18; } public static bool ToqYokiJuft(int num) { return num % 2 != 0; } } 

using System.Collections; using System.Collections.Generic; namespace Predicate; public static class LinqExtansions { public delegate bool Predicate<T1>(T1 arg1); public static IEnumerable<T1> KottaBollar<T1>(this IEnumerable<T1> bollar, Predicate<T1> callback) { // var result = new List<T1>(); foreach(var item in bollar) { if(callback.Invoke(item)) { // result.Add(item); yield return item; } } // return result; } } 

21 41 27 23