static void Main(string[] args)
{
PureList <int?> pureList = new PureList <int?>(1, 2, 3, 4, 5, 6, 7, 8, 9);
WriteLine("Calling Head => ");
WriteLine(pureList.Head());
WriteLine();
WriteLine("Calling Tail => ");
PureList <int?> TailList = pureList.Tail();
for (int i = 0; i < TailList.Length; i++)
{
Write(TailList[i] + " ");
}
WriteLine();
WriteLine();
WriteLine("Callng Cons => ");
PureList <int?> ConsList = pureList.Cons(99);
for (int i = 0; i < ConsList.Length; i++)
{
Write(ConsList[i] + " ");
}
WriteLine();
WriteLine();
WriteLine("Calling Drop => ");
PureList <int?> DropList = pureList.Drop(2);
for (int i = 0; i < DropList.Length; i++)
{
Write(DropList[i] + " ");
}
WriteLine();
WriteLine();
WriteLine("Callinh Reverse => ");
PureList <int?> ReverseList = pureList.Reverse();
for (int i = 0; i < ReverseList.Length; i++)
{
Write(ReverseList[i] + " ");
}
WriteLine();
WriteLine();
WriteLine("Calling Filter");
PureList <int?> EvenElementList = pureList.Filter(e => e % 2 == 0);
for (int i = 0; i < EvenElementList.Length; i++)
{
Write(EvenElementList[i] + " ");
}
WriteLine();
}
private static PureList <T> FilterApply <T>(PureList <T> list, FilterPredicate <T> predicate, PureList <T> output, int n) =>
(n < 0) ? output : FilterApply(
list,
predicate,
predicate(list[n]) ? output.Cons(list[n]) : output,
n - 1);
