queue

问题 I have my transactional email system setup & by default people get emails as events happen: class Comment after_create :email_original_poster def email_original_poster UserMailer.delay.notify_author_of_comment self end end However instead of getting the email as-it-happens, a chunk of my users would prefer a daily or weekly digest. What's the cleanest most elegant way to implement this? I've already got delayed_job running but this doesn't really feel like a delayed_job job since I'm queueing

问题 I have my transactional email system setup & by default people get emails as events happen: class Comment after_create :email_original_poster def email_original_poster UserMailer.delay.notify_author_of_comment self end end However instead of getting the email as-it-happens, a chunk of my users would prefer a daily or weekly digest. What's the cleanest most elegant way to implement this? I've already got delayed_job running but this doesn't really feel like a delayed_job job since I'm queueing

问题 I know there are many post on Stack Exchange related to writing results from multiprocessing to single file and I have developed my code after reading only those posts. What I am trying to achieve is that run 'RevMapCoord' function in parallel and write its result in one single file using multiprocess.queue. But I am having problem while queuing my job. My Code: def RevMapCoord(list): "Read a file, Find String and Do something" def feed(queue, parlist): for par in parlist: print ('Echo from

问题 I create 100 child processes proc_list = [ Process(target = simulator, args=(result_queue,)) for i in xrange(100)] and start them for proc in proc_list: proc.start() Each process puts into the result_queue (instance of multiprocessing.Queue) 10000 tuples after doing some processing. def simulate(alg_instance, image_ids, gamma, results, simulations, sim_semaphore): (rs, qs, t_us) = alg_instance.simulate_multiple(image_ids, gamma, simulations) all_tuples = zip(rs, qs, t_us) for result in all

问题 I need a simple table that acts as a Queue. My MySQL server restriction is I can't use InnoDB tables, only MyISAM. Clients/workers will work at the same time and they will need to receive differents jobs each time. My idea is to do the following (pseudo-code): $job <- SELECT * FROM queue ORDER BY last_pop ASC LIMIT 1; UPDATE queue SET last_pop WHERE id = $job->id return $job I had tried table lock and "GET_LOCK" but nothing happends, workers sometimes receives same jobs. 回答1: You need to turn

问题 I don't know much about arrays and queues and stacks. I know how to implement a simple queue. #include <iostream> #include <queue> using namespace std; void main() { queue<char> queue1; queue1.push('a'); queue1.push('b'); queue1.push('c'); queue1.push('d'); while(!queue1.empty()) { cout << queue1.front(); queue1.pop(); cout << endl; } system("pause"); } How can I implement a simple queue using an array? 回答1: If your queue is based on an array, then for efficiency's sake, I would recommend

问题 Is there a better way to wait for queued threads before execute another process? Currently I'm doing: this.workerLocker = new object(); // Global variable this.RunningWorkers = arrayStrings.Length; // Global variable // Initiate process foreach (string someString in arrayStrings) { ThreadPool.QueueUserWorkItem(this.DoSomething, someString); Thread.Sleep(100); } // Waiting execution for all queued threads lock (this.workerLocker) // Global variable (object) { while (this.RunningWorkers > 0) {

问题 what is the difference among list, queue and set? 回答1: In brief: A list is an ordered list of objects, where the same object may well appear more than once. For example: [1, 7, 1, 3, 1, 1, 1, 5]. It makes sense to talk about the "third element" in a list. You can add an element anywhere in the list, change an element anywhere in the list, or remove an element from any position in the list. A queue is also ordered, but you'll only ever touch elements at one end. All elements get inserted at

问题 A bit of a long description below, but it is a quite tricky problem. I have tried to cover what we do know about the problem in order to narrow down the search. The question is more of an ongoing investigation than a single-question based one but I think it may help others as well. But please add information in comments or correct me if you think I am wrong about some assumptions below. UPDATE 19/2, 2013: We have cleared some question marks in this and I have a theory of what the main problem

问题 NOTE: i did a complete rework of my question. you can see the original question via the change-history. i'm in the need of a "mighty" queue, which provides following functionalities: i have a certain scope for a group of objects. that means that Group A , Group B , ... will have their own queue i'm filling a queue in a group-scoped thread Thread A (Producer) i'm reading a queue in a group-scoped thread Thread B (Consumer) so i will have following scenarios: there is and will be no item in the