scheduling

问题 There are a limited number of players and a limited number of tennis courts. At each round, there can be at most as many matches as there are courts. Nobody plays 2 rounds without a break. Everyone plays a match against everyone else. Produce the schedule that takes as few rounds as possible. (Because of the rule that there must a break between rounds for everyone, there can be a round without matches.) The output for 5 players and 2 courts could be: | 1 2 3 4 5 -|------------------- 2| 1 - 3

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 2 years ago . This Question is intended as a canonical Question/Answer for disambiguation as to the descriptive term "recursion", or "recursive". And to the extent applicable, "a non-terminating procedure that happens to refer to itself" and "repeated scheduling". In JavaScript what are the

问题 I've read a few posts here on StackOverflow about task scheduling, but I'm not sure that I get it right. I'm coding (in VB.Net) a backup application, that I'd like to add as a scheduled task (in fact, I'd just like to let the user decide to run it every day at, for example, 3 AM). I've read posts suggesting to use a windows service for this, but it sounds a bit to much for something as simple as periodically running a task, isn't it? Could you please advise me on how to simply set a scheduled

问题 I'm making use of Quartz Scheduling and there are 2 jobs. First Job is performing the tasks for around 2 minutes and the Second one is to be setup for Cleaning Operations of Temporary Files. So, I need to setup the Schedule to work in a way that after the first job is executed/finished performing tasks I need to do the cleaning operations with the help of Second Job. Considering the Example 9 - Job Listeners under Quartz 2.1.x which states that we can define a method named jobWasExecuted( _,

问题 I'm looking for some comparison between Quartz.NET and Windows Scheduled Tasks? How different are they? What are the pros and cons of each one? How do I choose which one to use? TIA, 回答1: With Quartz.NET I could contrast some of the earlier points: Code to write - You can express your intent in .NET language, write unit tests and debug the logic Integration with event log, you have Common.Logging that allows to write even to db.. Robust and reliable too Even richer API It's mostly a question

问题 How can I reschedule a timer. I have tried to cancel the timer/timertask and and schedule it again using a method. But its showing an exception error: Exception errorjava.lang.IllegalStateException: TimerTask is scheduled already Code I have used it : private Timer timer = new Timer("alertTimer",true); public void reScheduleTimer(int duration) { timer.cancel(); timer.schedule(timerTask, 1000L, duration * 1000L); } 回答1: If you see the documentation on Timer.cancel() you'll see this: "Cancels

问题 Situation I have a Runnable. I have a class that schedules this Runnable for execution using a ScheduledExecutorService with scheduleWithFixedDelay. Goal I want to alter this class to schedule the Runnable for fixed delay execution either indefinitely, or until it has been run a certain number of times, depending on some parameter that is passed in to the constructor. If possible, I would like to use the same Runnable, as it is conceptually the same thing that should be "run". Possible

问题 I use ScheduledExecutorService to execute a method periodically. p-code: ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor(); ScheduledFuture<?> handle = scheduler.scheduleWithFixedDelay(new Runnable() { public void run() { //Do business logic, may Exception occurs } }, 1, 10, TimeUnit.SECONDS); My question: How to continue the scheduler, if run() throws Exception? Should I try-catch all Exception in method run() ? Or any built-in callback method to handle the

问题 I'm looking to make a 3-column layout similar to that of piccsy.com. Given a number of images of the same width but varying height, what is a algorithm to order them so that the difference in column lengths is minimal? Ideally in Python or JavaScript... Thanks a lot for your help in advance! Martin 回答1: How many images? If you limit the maximum page size, and have a value for the minimum picture height, you can calculate the maximum number of images per page. You would need this when

问题 Is there any way in Linux to assign one CPU core to a particular given process and there should not be any other processes or interrupt handlers to be scheduled on this core? I have read about process affinity in Linux Binding Processes to CPUs using the taskset utility but that's not solving my problem because it just try to affine the given process to that core but it is possible that other processes may be scheduled on this core and this is what I want to avoid. Should we change the kernel