I’d use an IDENTITY field as the primary key to provide the uniquely incrementing ID for each queued item, and stick a clustered index on it. This would represent the order in which the items were queued. To keep the items in the queue table while you process them, you’d need a “status” field to … Read more
Deque is short for “double ended queue”. With an ordinary queue, you add things to one end and take them from the other. With a double ended queue, you can add things to either end, and take them from either end. That makes it a bit more versatile; for example, you could use it as … Read more
>>> list(collections.deque((1, 2, 3))) [1, 2, 3]
You’ve been to a cafeteria, right? and seen a stack of plates? When a clean plate is added to the stack, it is put on top. When a plate is removed, it is removed from the top. So it is called Last-In-First-Out (LIFO). A computer stack is like that, except it holds numbers, and you … Read more
If a is a PriorityQueue object, You can use a.queue[0] to get the next item: from queue import PriorityQueue a = PriorityQueue() a.put((10, “a”)) a.put((4, “b”)) a.put((3,”c”)) print(a.queue[0]) print(a.queue) print(a.get()) print(a.queue) print(a.get()) print(a.queue) output is : (3, ‘c’) [(3, ‘c’), (10, ‘a’), (4, ‘b’)] (3, ‘c’) [(4, ‘b’), (10, ‘a’)] (4, ‘b’) [(10, ‘a’)] but … Read more
Some of the basic data structures in programming languages such as C and C++ are stacks and queues. The stack data structure follows the “First In Last Out” policy (FILO) where the first element inserted or “pushed” into a stack is the last element that is removed or “popped” from the stack. Similarly, a queue … Read more
You problem here is, that .ajax() fires an asyncronous running Ajax request. That means, .ajax() returns immediately, non-blocking. So your queue the functions but they will fire almost at the same time like you described. I don’t think the .queue() is a good place to have ajax requests in, it’s more intended for the use … Read more
Performance can be profiled. Though in this case of so few items, you may need to run the code millions of times to actually get worthwhile differences. I will say this: Queue<T> will expose your intent more explicitly, people know how a queue works. A list being used like a queue is not as clear, … Read more
I don’t know if this is canonical but, does this count? Also here are examples of queues in SDL-88 http://www.sdl-forum.org/sdl88tutorial/4.ProcessCommunication/4.1_Signal_input_queue.htm
I’ve knocked up a basic version of what I’m looking for, it’s not perfect but it’ll do the job until something better comes along. public class LimitedQueue<T> : Queue<T> { public int Limit { get; set; } public LimitedQueue(int limit) : base(limit) { Limit = limit; } public new void Enqueue(T item) { while (Count … Read more