C# – The most efficient way to get object with max value from list of objects

c++lismaxmin

I have an object called entry. It has min and max in float and fileName in string. And those objects are stored in a list

List<Entry> minMaxList = new List<Entry>();

I need to find an object(s) with the highest value and with the minimum value alongside with its file name.

So if I have an array like this

       Entry1                    Entry2                  Entry3
min  max    filename        min  max    filename      min  max    filename
| 2 | 120 |  file1.txt |  | 2 | 150 |  file1.txt |  | 5 | 150 |  file1.txt |     

I want to get that the objects with the lowest value are Entry1 and Entry2 and objects with the highest value are Entry2 and Entry3

I tried this:

var max =  minMaxList.Max(r => r.getMax())

which works good, but it returns me a single value, without any other information about where it came from. I need either the whole object, or at least the filenames in which this value is. I wonder if it can be done in a single command, or if I have to then iterate the list again and find all the entries base on the min and max selected earlier.

Best Solution

You can always filter the enumerable instead of only letting the maximum value through:

var maxvalue = minMaxList.Max(w => w.getMax());
var maxitems = minmaxlist.Where(w => w.getMax() == maxvalue);