The fastest and easiest way to intersect all lists from two different objects

Question

public class Info
{
    public List<string> Projects { get; set; }
    public List<string> Schools { get; set; }
    public List<string> Locations { get; set; }
    public List<string> Interests { get; set; }
    public List<string> Hobbies { get; set; }
}

To intersect 2 lists, you can just do this: list1.Select(a => a.Projects).Intersect(list2.Select(b => b.Projects));

But what if you want to have maybe an third object with the common strings let's say from the first two objects?

What prevents you from continue doing the Intersect as you move further from 1st to last list, you will get the final solution. `ProjectList.Intersect(SchoolList).Intersect(LocationList).Intersect(InterestList).Intersect(HobbyList)` — Mrinal Kamboj, Jan 13 '17 at 13:33
@MrinalKamboj nothing prevents me, but i thought maybe with onliner it can be done? — Gerald Hughes, Jan 13 '17 at 13:34
@SGN Cool, this would be the simplest in my view, just fetch the final result in a List — Mrinal Kamboj, Jan 13 '17 at 13:38
See msdn samples : https://code.msdn.microsoft.com/101-LINQ-Samples-3fb9811b — jdweng, Jan 13 '17 at 13:42

score 2 · Accepted Answer · answered Jan 13 '17 at 13:40

Simplest solution I can think of is Cascading Intersection:

var result = Projects.Intersect(Schools)
                     .Intersect(Locations)
                     .In‌tersect(Interests)
                     .Intersect(Hobbies)
                     .ToList();

The fastest and easiest way to intersect all lists from two different objects

1 Answers1