3 ms·
C#: data.GroupBy(i => i).Where(g => g.Count() > 1) .Select(g => g.Key) .ToList().ForEach(x => Console.WriteLine(x));
by primodemus 16y ago
C#:
data.GroupBy(i => i).Where(g => g.Count() > 1)
.Select(g => g.Key)
.ToList().ForEach(x => Console.WriteLine(x));