How do I select every 6th element from a list (using Linq)
c#, linq
Solution
coordinateRange.Where( ( coordinate, index ) => (index + 1) % 6 == 0 );
The answer from Webleeuw was posted prior to this one, but IMHO it's clearer to use the index as an argument instead of using the `IndexOf` method.
Problem
I've got a list of 'double' values. I need to select every 6th record. It's a list of coordinates, where I need to get the minimum and maximum value of every 6th value. List of coordinates (sample): `[2.1, 4.3, 1.0, 7.1, 10.6, 39.23, 0.5, ... ]` with hundrets of coordinates. Result should look like: `[x_min, y_min, z_min, x_max, y_max, z_max]` with exactly 6 coordinates. Following code works, but it takes to long to iterate over all coordinates. I'd like to use Linq instead (maybe faster?) ``` for (int i = 0; i < 6; i++) { List<double> coordinateRange = new List<double>(); for (int j = i; j < allCoordinates.Count(); j = j + 6) coordinateRange.Add(allCoordinates[j]); if (i < 3) boundingBox.Add(coordinateRange.Min()); else boundingBox.Add(coordinateRange.Max()); } ``` Any suggestions? Many thanks! Greets!