Question

[0,0,0]
[1,1,1]
[2,2,2]

I have the above 2 dimensional array.

I need to check for 3 things, first is to check if all the cells are filled just like above.

Second:

[0,0,0]
[1]
[]

For the above array, I need to check if all the cells are populated per row.

Third:

[0,]
[1,1]
[2,2,2]

I want to find if the first elements of first column are populated.

I can do it with foreach loops, or for loop. but i want to use All(predicate) with linq.

            foreach (var ticketValue in ticketValues)
            {
                firstRow = ticketValue.All(x => x == i);

                foreach (var value in ticketValue)
                {

                }
            } 

What would be the best way to do this?

Answer 1

I’m assuming you’re setting up that 2D like this:

int?[][] myArrayA = new int?[][] { new int?[] {0,0,0}, new int?[] {1,1,1}, new int?[] {2,2,2} };
int?[][] myArrayB = new int?[][] { new int?[] {0,0,0}, new int?[] {1}, new int?[] {null} };
int?[][] myArrayC = new int?[][] { new int?[] {0,null}, new int?[] {1,1,1}, new int?[] {2,2,2} };

So, using Linq we do this:

bool FirstCheck(int?[][] theArray)
{
    int size = (from arrays in theArray select arrays.GetUpperBound(0)).Max();

    var check = from arrays in theArray
                where theArray.All(sub => sub.GetUpperBound(0) == size)
                select arrays;

    return size + 1 == check.Count<int?[]>();
}

bool SecondCheck(int?[][] theArray)
{
    int size = (from arrays in theArray select arrays.GetUpperBound(0)).Max();

    var check = from arrays in
                    (from subs in theArray
                     where theArray.All(sub => sub.All(value => value != null))
                     select subs)
                where arrays.GetUpperBound(0) == size
                select arrays;

    return size + 1 == check.Count<int?[]>();
}

bool ThirdCheck(int?[][] theArray)
{
   int size = (from arrays in theArray select arrays.GetUpperBound(0)).Max();

   var check = from arrays in theArray
               where theArray.All(array => array[0].HasValue)
               select arrays;

   return size + 1 == check.Count<int?[]>();
}

Hope that’s what you were wanting…