Question

This is the code:

var numbers =
               lightningsRegions.SelectMany(
          s => Regex.Matches(s, @"\[(\d+)[ -]+(\d+)\]")
               .Cast<Match>()
               .Select(m => m.Groups.Cast<Group>().Skip(1).Select(x => x.Value)
                                                          .ToArray())
               .Select(x => new { start = int.Parse(x[0]), end = int.Parse(x[1]) })
               .SelectMany(x => Enumerable.Range(x.start, x.end - x.start + 1))
        )
       .ToList();


                for (int i = 0; i < list_of_histogramsR.Count ; i++)
                {
                  if (list_of_histogramsR[i] == numbers[i])
                    {

                    }
                }

I consider the variable numbers as number of indexs. In the end numbers contain 5372 numbers.
So each number from thr 5272 is like an index.

Now i have this List<long[]> list_of_histogramsR wich contain 16595 indexs.
I want to check that if any number from numbers is in list_of_histogramsR as index number then do something.

For example the first number in numbers is 41. So when index number 41 of list_of_histogramsR == to the number 41 in numbers do something. Then the same for the next numbers in the variable numbers.

The problem is that on the IF line im getting error: Error 33 Operator ‘==’ cannot be applied to operands of type ‘long[]’ and ‘int’

Why ?

Answer 1

You can use Contains to check if the list contains a specific number (cast the int to a long):

list_of_histogramsR[i].Contains((long)numbers[i])