LINQ / Objects如何删除项目并将其添加到另一个列表

Question

I'm using Linq with objects and have a question.

Actual workload is processed in a background job.

The actual workload should not be put to further tasks. It is more important, that the method which processes the actual workitems does it quite fast and gives a result, therefore the complete workload is put to chunks of workitems.

At a time, I only process the first n objects of the list, therefore I take n objects and then remove them from the complete list of workitems.

Roughly:

int amount = 100;
List<WorkItem> actualWorkload = null;

lock(lockWorkload){ // complete Workload is filled in other thread
    if (actualWorkload.Count > amount)
    {
        actualWorkload.AddRange(completeWorkload.Take(amount));
    }
    else
    {
        actualWorkload.AddRange(completeWorkload);
    }
    completeWorkload.RemoveAll(x => actualWorkload.Contains(x));
}
//do something with workitems Process(actualWorkload);

My question is: can 'Take' and 'Remove' be somehow combined, so that there is only one step to take items and directly remove this items from a list? I search fro something liek the 'Take' of a BlockingCollection which removes an item while it is returned.

Answer 1

Even if there would be an operation that allows that, in the background it would still need to remove and add them.

But maybe you don't need two lists? Maybe you could have only one list with all items, and each item has a status that you set to a different value or something. But of course, I don't know your exact case so this may not be feasible.

Answer 2

"Take and remove" sounds to me a lot like "Dequeue", so perhaps you could just use a Queue or a ConcurrentQueue ?

However, the enumerator does NOT remove items from the queue, so you would have to call Dequeue repeatedly yourself.