Question

I am trying to write a linq query.

I need my query to take a 2 dimensional array (d). It needs to check for each array within d if the first and last elements are not empty but any element within is empty, it will remove the empty element.

Example

{{test,"",test}, {test, test, test,"",test}} = {{test,test}, {test, test, test,test}}

But I need to be able to keep empty strings so cannot just search for them and remove them.

I hope I have explained that well enough.

Answer 1

Maybe

var out = input.Select(x =>
       ((!String.IsNullOrEmpty(x.FirstOrDefault()))
        && (!String.IsNullOrEmpty(x.LastOrDefault())))
           ? x.Where(y => !String.IsNullOrEmpty(y)).ToArray()
           : x).ToArray();

If you only need IEnumerables you can probably remove the ToArrays.