Question

I have a build version list

List<int[]> BuildVersions;

How can i find last build version.

Build Versions such as

100.1.2.3
101.12.3.2
101.12.3.3

Update: the expression must check first number then second one,then third one ,then last one

Answer 1

int[] maxVersion = buildVersions.OrderByDescending(v => v[0])
                                .ThenByDescending(v => v[1])
                                .ThenByDescending(v => v[2])
                                .FirstOrDefault();

OR a more generic solution is as under

T[] HierarchicalMax<T>(IEnumerable<T[]> items)
        {
            var length = items.Min(v => v.Length);
            IEnumerable<T[]> result = items;

            for (int i = 0; i < length; i++)
            {
                int offset = i;
                result = result.OrderByDescending(v => v[offset]);
            }

            T[] max = result.FirstOrDefault();

            return max;
        }