Operating on integers

Class IntegerOperation provides method Operate(FuncInt32, Int32, Int32) to manage operations on integer values.

In the following example, an integer is squared executing the Operate(FuncInt32, Int32, Int32) method. This is equivalent to define the applied function, say LaTeX equation as

LaTeX equation

In addition, input validation is also checked.

C#
using System;
namespace SampleClassLibrary.CodeExamples
{
    public class IntegerOperationExample  
    {
        public void Main() 
        {
            // Define an operator that squares its operand
            Func<int, int> square = (int operand) => operand * operand;

            // Define an operand
            int integer = 2;

            // Operate on it
            Console.WriteLine("Squaring {0}...", integer);
            int result = IntegerOperation.Operate(square, integer);
            Console.WriteLine("...the result is {0}.", result);

            // Check that an operator cannot be null
            try
            {
                IntegerOperation.Operate(null, 0);
            }
            catch (Exception e)
            {
                Console.WriteLine();
                Console.WriteLine("Cannot apply a null function:");
                Console.WriteLine(e.Message);
            }
        }
    }
}

// Executing method Main() produces the following output:
// 
// Squaring 2...
// ...the result is 4.
// 
// Cannot apply a null function:
// Value cannot be null.
// Parameter name: func

See Also