Question

Using C#

I have

Queue N: 3, 4 9, 11

Queue A: 1, 2, 3, 4, 8, 9, 11, 12, 13

I want to remove all elements from Queue A that are present in Queue N

And end up with Queue R: 1, 2, 8, 12, 13

How do I do this in C#

Trying to work with someones API and they offer a way to get the two queues and I need to filter based on one queue returned.

Thanks,

-Seth

Updated Code Example:

I am using a custom data type ModuleDetails

Queue<ModuleDetails> defaultQueue = apiCallDefault();
Queue<ModuleDetails> modQueue = apiCallAllModules();

Answer 1

Easiest to do it with LINQ-to-Objects…

var qN = new Queue<int>(new[]{3, 4, 9, 11});
var qA = new Queue<int>(new[]{1, 2, 3, 4, 8, 9, 11, 12, 13});
var qR = qA.Except(qN);

UPDATE: As long as ModuleDetails implements IEquatable, the code below will work just fine. If you can’t modify ModuleDetails, you can always supply an IEqualityComparer as the second argument of Except, which defines how equality is determined.