queue

问题 I am looking to copy the entire contents of a vector into a queue in C++. Is this a built in function or is it nessesary to loop over each element? 回答1: If you make a new queue, you can use the constructor: std::vector<int> v = get_vector(); std::queue<long int, std::deque<long int>> q(std::deque<long int>(v.begin(), v.end())); (You can change the underlying container to taste, though deque is probably the best.) If the queue already exists, there's no range-based algorithm, though, you can

问题 I am new to LinkedList class, and facing difficulties as to how to use it in order to implement or instantiate stack and queues object. I am not looking for piece of self-implemented codes. I wanted to know how do we use this class as stack and queues and can use the already defined methods: pop,push,enqueue and dequeue or top (in case of stacks). 回答1: Queue A LinkedList is already a queue, since it implements the Queue interface (and check the Javadoc yourself). Hence it has the following

问题 I am currently considering moving from Supervisor to Monit in order to monitor a Laravel queue worker. Main reason is the ability to monitor CPU, Memory, and set email alerts (afaik with Supervisor I must install another package) since I will want to monitor other things soon such as Redis and perhaps the overall stability and performance of the web server. To my limited knowledge in process monitoring, Monit is more robust and suitable for the job. All the documentation that I could find

问题 I am interested in a data structure identical to the Java BlockingQueue, with the exception that it must be able to batch objects in the queue. In other words, I would like the producer to be able to put objects into the queue, but have the consumer block on take() untill the queue reaches a certain size (the batch size). Then, once the queue has reached the batch size, the producer must block on put() untill the consumer has consumed all of the elements in the queue (in which case the

问题 I am interested in a data structure identical to the Java BlockingQueue, with the exception that it must be able to batch objects in the queue. In other words, I would like the producer to be able to put objects into the queue, but have the consumer block on take() untill the queue reaches a certain size (the batch size). Then, once the queue has reached the batch size, the producer must block on put() untill the consumer has consumed all of the elements in the queue (in which case the

问题 Sometimes when I'm sending over a large dataset to a Job, my queue worker exits abruptly. // $taskmetas is an array with other arrays, each subsequent array having 90 properties. $this->dispatch(new ProcessExcelData($excel_data, $taskmetas, $iteration, $storage_path)); The ProcessExcelData job class creates an excel file using the box/spout package. in the 1st example $taskmetas has 880 rows - works fine in the 2nd example $taskmetas has 10,000 rows - exits abruptly 1st example - queue output

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . I would like to find a node in my priority queue but I did not find a solution :( If you have a solution, I'm interested. Thx for help. 回答1: If you really need to search through a std::priority_queue and want to

问题 I was reading Elementary Data Structures from CLRS and while reading Queue ADT I came across this: When Q.head = Q.tail + 1 , the queue is full, and if we attempt to enqueue an element, then the queue overflows. Is it always true? because if Q.tail equals Q.length then we set Q.tail = 1 according to the text. Therefore if we completely fill the Queue then Q.tail and Q.head will be pointing to the same position (index 1) and the above condition shall not hold. What am I missing here? Please

问题 Is there a simple way to get the position of an element in a std::queue by its value in C++? For example: std::queue<int> numbers; numbers.push(7); numners.push(4); numbers.push(11); int position = numbers.getPosition(4); //should be 1 回答1: If you want to get the index of an element you should probably consider using an std::deque container instead of a std::queue container adapter , as already suggested in this other answer. If you still want to stick to to the std::queue container adapter

问题 I have multiple Bull Queues in my NodeJS project which will run if previous queue is executed successfully. I'm trying to verify some email addresses here. Check the Email format (formatQueue) Email Existence using npm email-existence package (existenceQueue) The formatQueue is less time taking process, which wil run the RegEx and validate the Email format. but The email-existence package takes around 5-10 seconds to complete. formatQueue and existenceQueue works properly if there are less