Lesson 03 homework_muhammad

Lesson04/Lesson04/Homework.cs

@@ -0,0 +1,109 @@
+namespace Lesson04
+{
+
+    public delegate bool NumberCheck(int number);
+    public delegate int Calculate(int number);
+
+    internal static class Homework
+    {
+        public static bool All(int[] array, NumberCheck checker)
+        {
+            foreach (var number in array)
+            {
+                if (!checker(number))
+                {
+                    return false;
+                }
+            }
+
+            return true;
+        }
+
+        public static bool AllPredicate(int[] array, Predicate<int> predicate)
+        {
+            foreach (var number in array)
+            {
+                if (!predicate(number))
+                {
+                    return false;
+                }
+            }
+
+            return true;
+        }
+
+        public static bool Any(int[] array, NumberCheck checker)
+        {
+            foreach (var number in array)
+            {
+                if (checker(number))
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        public static bool AnyPredicate(int[] array, Predicate<int> predicate)
+        {
+            foreach (var number in array)
+            {
+                if (predicate(number))
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        public static int Sum(int[] array, Calculate calculate)
+        {
+            int sum = 0;
+
+            foreach (var number in array)
+            {
+                sum += calculate(number);
+            }
+
+            return sum;
+        }
+
+        public static int SumFunc(int[] array, Func<int, int> func)
+        {
+            int sum = 0;
+
+            foreach (var number in array)
+            {
+                sum += func(number);
+            }
+
+            return sum;
+        }
+
+        public static int Average(int[] array, Calculate calculate)
+        {
+            int sum = 0;
+            // 1 + 4 + 9 + 16 + 25 = 55
+            foreach (var number in array)
+            {
+                sum += calculate(number);
+            }
+
+            return sum / array.Length;
+        }
+
+        public static int AverageFunc(int[] array, Func<int, int> func)
+        {
+            int sum = 0;
+
+            foreach (var number in array)
+            {
+                sum += func(number);
+            }
+
+            return sum / array.Length;
+        }
+    }
+}