How to check whether each item of an array exist in another array in mvc 4?

Question

I have two string arrays for example selPhoto["419","418"] and preview_photo["418"].I need to check whether each element in selPhoto present in preview_photo or not in mvc4.

_"Insufficient data for meaningful answer"_ - Isaac Asimov. Any code to show? — , Oct 09 '15 at 05:57
Hmmm...the person who upvoted this should perhaps read _[How do I ask a good question?](http://stackoverflow.com/help/how-to-ask)_ along with the OP — , Oct 09 '15 at 06:18
Possible duplicate of [Check whether an array is a subset of another](http://stackoverflow.com/questions/332973/check-whether-an-array-is-a-subset-of-another) — 31eee384, Oct 11 '15 at 07:05

score 0 · Answer 1 · answered Oct 09 '15 at 05:58

0

How about this:

var y = new[] { "419", "418" };
var x = new[] { "418" };

Check for intersection

x.Intersect(y).Contains("418");

answered Oct 09 '15 at 05:58

Jim

14,952
15
80
167

score 0 · Answer 2 · answered Oct 09 '15 at 05:58

You can try to check if one array is a subset of another:

bool isSubset = !array2.Except(array1).Any();

So it would be like

bool isSubset = !preview_photo.Except(selPhoto).Any();

You can try to create an extension method as well for this

public static bool isSubset<T>(this IEnumerable<T> arr1, IEnumerable<T> arr2)
{
    return !arr1.Except(arr2).Any();
}

score 0 · Answer 3 · answered Oct 09 '15 at 05:58

0

You can use Except and check to see if there are any items in the resulting set

var containsAllElements = !preview_photo.Except(selPhoto).Any();

answered Oct 09 '15 at 05:58

David Pilkington

13,528
3
41
73

score 0 · Answer 4 · answered Oct 12 '15 at 04:08

public ActionResult AddtoCart(string selPhoto, string preview_photo)
        {

    string[] values = selPhoto.Split(',');
    string[] photo = preview_photo.Split(',');
    foreach (var item in values)
    {
        if (photo.Contains(item))
        {
          // do action item in second array
        }

        else
        {
         //do action item not in second array
        }
    }
}

score 0 · Answer 5 · answered Oct 12 '15 at 04:36

0

var y = new[] { "419", "418" };
var x = new[] { "418" };
bool present=y.ToList().TrueForAll(a=>x.Contains(a));

however its always good to show what you have tried

answered Oct 12 '15 at 04:36

Akshita

849
8
15

How to check whether each item of an array exist in another array in mvc 4?

5 Answers5