I need to retrieve from this array point where the X is the biggest number

Question

I have points struct array:

Point[] arr  = samples.pointsArray;

I need to retrieve from this array point where the X is the biggest number.

  Point maxX= (some logic);

Any idea how I can implement this?

"X is the smallest number." What is X? – Ganesh R. Nov 25 '12 at 14:41 — Ganesh R., Nov 25 '12 at 14:41
X is th biggest number. i did mistake. – Michael Nov 25 '12 at 14:45 — Michael, Nov 25 '12 at 14:45

score 4 · Accepted Answer · edited May 23 '17 at 11:43

4

Use the OrderBy and First LINQ operators:

Point minX = arr.OrderBy(p => p.X).First();

Point maxX = arr.OrderByDescending(p => p.X).First();
or
Point maxX = arr.OrderBy(p => p.X).Last();

edited May 23 '17 at 11:43

Community

answered Nov 25 '12 at 14:36

Rotem

Any reason you changed the answer from .Min to OrderBy? – Ganesh R. Nov 25 '12 at 14:38
@Ganesh Because I noticed the OP wanted the **Point** with the lowest X, not the lowest X. – Rotem Nov 25 '12 at 14:41

score 1 · Answer 2 · answered Apr 14 '13 at 16:02

1

Without needing to reorder the array (!?!) as suggested by @Rotem, you can simply do:

int maxX = arr.Max(p => p.X);
Point maxXPt = arr.First(p => p.X == maxX);

Note this is done in O(n) whereas the OrderBy method is O(n log n).

answered Apr 14 '13 at 16:02

joce

2 Answers2