Question

One Generic list that contain Points say =>List<Point>

Now I need to filter points and store it in another List<Point> as per below condition and Using LINQ.

• At given Y value of Point

• Find Points with Maximum X values and Minimum X values.

NOTE:

Actually friends, I am looking for the LINQ query which performs above operation in just single query if possible.

Otherwise any best solution for above operation using LINQ,

EDIT:-
see my code here but i am looking for sort solution…..

               int givenY = 147;

                List<Point> listOfPointLocal = (from point in listOfPointMain
                        where point.Y == givenY
                        select point).ToList();

                var minX = listOfPointLocal.Min(p => p.X);
                var maxX = listOfPointLocal.Max(p => p.X);

                List<Point> listOfFilterdPoint = (from p in listOfPointLocal
                                         where p.X <= minX || p.X >= maxX
                                         select p).ToList();

Thanks…..

Answer 1

With a little help from an extra class you can pass the list only once.

public class MaxMin
{
    public int max { get; set; }
    public int min { get; set; }
}

And then

var points = new List<Point>() 
                {
                    new Point(10, 10), 
                    new Point(15, 10), 
                    new Point(20, 10), 
                    new Point(42, 42), 
                    new Point(47, 11) 
                };

var maxmin = new MaxMin() { max = int.MinValue, min = int.MaxValue};
maxmin = points.Where(p => p.Y == 10).
                    Aggregate(maxmin, (acc, next) =>
                    {
                        if (next.X > acc.max) acc.max = next.X;
                        if (next.X < acc.min) acc.min = next.X;
                        return acc;
                    });