Linq/Lambda OrderBy Delegate for List of IP Addresses

Question

Given List ips = new List();

I need to sort the list of IP addresses in a logical order (i.e. \"192.168.0.2\" comes before \

Answer 1

You need to make a comparer: (Tested)

class IPComparer : IComparer {
    public int Compare(string a, string b) {
        return Enumerable.Zip(a.Split('.'), b.Split('.'), 
                             (x, y) => int.Parse(x).CompareTo(int.Parse(y)))
                         .FirstOrDefault(i => i != 0); 
    }
}

You can then write

ips.OrderBy(p => p, new IPComparer())