public void ComplexTest()
{
list.Add(1);
list.Add(22);
list.Add(-3);
list.Add(1);
list.Add(0);
list.Add(222);
list.Add(1);
list.Add(-79);
list.Add(38);
list = Functions.Map(list, x => x - 4);
Assert.AreEqual(9, list.GetLength());
Assert.AreEqual(34, list.GetElement(8));
Assert.AreEqual(-83, list.GetElement(7));
Assert.AreEqual(-3, list.GetElement(6));
Assert.AreEqual(218, list.GetElement(5));
Assert.AreEqual(-4, list.GetElement(4));
Assert.AreEqual(-3, list.GetElement(3));
Assert.AreEqual(-7, list.GetElement(2));
Assert.AreEqual(18, list.GetElement(1));
Assert.AreEqual(-3, list.GetElement(0));
list = Functions.Filter(list, x => x % 3 == 0);
Assert.AreEqual(4, list.GetLength());
Assert.AreEqual(-3, list.GetElement(3));
Assert.AreEqual(18, list.GetElement(2));
Assert.AreEqual(-3, list.GetElement(1));
Assert.AreEqual(-3, list.GetElement(0));
Assert.AreEqual(991, Functions.Fold(list, 1000, (acc, elem) => acc - elem));
}
/// <summary>
/// Map function for list
/// </summary>
/// <param name="list"> List for change </param>
/// <param name="function"> Changing function </param>
/// <returns> Changed list </returns>
public static List Map(List list, Func<int, int> function)
{
List newList = new List();
for (int i = 0; i < list.GetLength(); ++i)
newList.Add(function(list.GetElement(i)));
return newList;
}
/// <summary>
/// Fold list function
/// </summary>
/// <param name="list"> List for calculating </param>
/// <param name="startValue"> Start value of calculating </param>
/// <param name="function"> Functiong for calculating </param>
/// <returns> Result of calculating </returns>
public static int Fold(List list, int startValue, Func <int, int, int> function)
{
for (int i = 0; i < list.GetLength(); ++i)
{
startValue = function(startValue, list.GetElement(i));
}
return(startValue);
}
/// <summary>
/// Filter list function
/// </summary>
/// <param name="list"> List for checking </param>
/// <param name="function"> Function for filter </param>
/// <returns> Filtered list </returns>
public static List Filter(List list, Func<int, bool> function)
{
List newList = new List();
for (int i = 0; i < list.GetLength(); ++i)
if (function(list.GetElement(i)))
newList.Add(list.GetElement(i));
return newList;
}
/// <summary>
/// Map function for list
/// </summary>
/// <param name="list"> List for change </param>
/// <param name="function"> Changing function </param>
/// <returns> Changed list </returns>
public static List Map(List list, Func <int, int> function)
{
List newList = new List();
for (int i = 0; i < list.GetLength(); ++i)
{
newList.Add(function(list.GetElement(i)));
}
return(newList);
}
public void FilterTest()
{
list.Add(0);
list.Add(50);
list.Add(-2);
list.Add(-9999);
list = Functions.Filter(list, x => x >= 0);
Assert.AreEqual(2, list.GetLength());
Assert.AreEqual(0, list.GetElement(0));
Assert.AreEqual(50, list.GetElement(1));
}
/// <summary>
/// Filter list function
/// </summary>
/// <param name="list"> List for checking </param>
/// <param name="function"> Function for filter </param>
/// <returns> Filtered list </returns>
public static List Filter(List list, Func <int, bool> function)
{
List newList = new List();
for (int i = 0; i < list.GetLength(); ++i)
{
if (function(list.GetElement(i)))
{
newList.Add(list.GetElement(i));
}
}
return(newList);
}
/// <summary>
/// Fold list function
/// </summary>
/// <param name="list"> List for calculating </param>
/// <param name="startValue"> Start value of calculating </param>
/// <param name="function"> Functiong for calculating </param>
/// <returns> Result of calculating </returns>
public static int Fold(List list, int startValue, Func<int, int, int> function)
{
for (int i = 0; i < list.GetLength(); ++i)
startValue = function(startValue, list.GetElement(i));
return startValue;
}