carlgv / Extension-methods-Boxing-Unboxing

Practice with boxing and unboxing, using also extension methods

VuelingBoxingUnboxing

This repository is the sample code developed to test: boxing, unboxing and extension methods on a simple console application.

Extension Methods Included

• Generate a number of elements and fill a list with them

  public static void FillListWithRandomValues(this List<object> list, int lengthOfList)
  {
  	Random rnd = new Random();
  	for (int i = 0; i < lengthOfList - 1; i++)
  	{
  		list.Add(rnd.Next(-50,200)); // boxing?
  	}
  }

  the method can be invoked this way:

  exampleList.FillListWithRandomValues(40);

• Calcualtes the total sum of the values in a List<object>

  public static int SumValuesOfList(this List<object> list)
  {
  	int sum = 0;
  	foreach (var i in list)
  	{
  		sum += (int)i; // unboxing
  	}
  	return sum;
  }

  in this case, also implement the unboxing of the values in the list to add them to sum and can be invoked like:

  int exampleListSum = list.SumValuesOfList();

• The last extension method is used to calculate de average of the values in a list:

  public static int AverageListCalculator (this List<object> list)
  {
  	int exampleListSum = list.SumValuesOfList();
  	int exampleListAverage = exampleListSum / list.Count();
  	return exampleListAverage;
  }

  I implement de method in the Main

  int listAverage = exampleList.AverageListCalculator();

  The last boxing case is:

  Console.WriteLine(string.Concat("The average value of the generated list of values is: ", listAverage)); // boxing