delayed-execution

问题 David Tonhofer posed an interesting problem about occurs check. An occurs check aware coroutine can be realized as follows with a predicate with_occurs_check/2 which can be easily implemented as a refinement of with_occurs_check/1: occurs_check_aware_freeze(X, G) :- current_prolog_flag(F), freeze(X, with_occurs_check(F, G)). Namely by using an with_occurs_check/2 with a further parameter. But the main problem of a realiable with_occurs_check/[1,2] that also works with backtracking remains.

问题 I understand that debounce in Undercore.js returns a function that will postpone its execution until the wait time is over. My question is, is there an advantage of using debounce over the regular setTimeout function in vanilla Javascript? Don't they both work the same? 回答1: They are very different and used in completely different cases. _.debounce returns a function , setTimeout returns an id which you can use to cancel the timeOut. No matter how many times you call the function which is

问题 I understand that debounce in Undercore.js returns a function that will postpone its execution until the wait time is over. My question is, is there an advantage of using debounce over the regular setTimeout function in vanilla Javascript? Don't they both work the same? 回答1: They are very different and used in completely different cases. _.debounce returns a function , setTimeout returns an id which you can use to cancel the timeOut. No matter how many times you call the function which is

问题 I want my Android app to do an auto demo, so after user clicks on a "Auto Demo" button, it will switch to a view and delay a second and click on a button on that view, then 2 seconds later click on another button on that screen .. so on, my java code looks like this : private class AutoDemoListener implements View.OnClickListener { public void onClick(View v) { Is_AutoDemo_B=true; Out("AutoDemoListener"); switchView(demoView, registrationView); startRegistration(); Thread t = new Thread(new

问题 I have a JQuery's .each loop that calls a function with a parameter per iteration, is there a way to delay this function call? I have tried setTimeout as in the following but this does not work as the function gets executed immediately. $.each(myArray, function (j, dataitem) { setTimeout(function () { showDetails(dataitem) }, 300); }); function showDetails(dataitem) { ... } Array size is roughly 20, What I'm trying to do is to distribute function calls over a certain time frame instead of

问题 What's the most elegant way of performing a delayed (and therefore also asynchronous) functional call using C++11, lambdas and async? Suggested naming: delayed_async . Reason for asking is that I want a GUI alert light to be switched off after given time (in this case one second) without blocking the main (wxWidgets main loop) thread of course. I've use wxWidgets' wxTimer for this and I find wxTimer rather cumbersome to use in this case. So that got my curious about how much more convenient

问题 I wish to make an AJAX call using jQuery as a "heartbeat" in the background so that my web application can check for new data. For example every 10 seconds. I have seen on other posts that it is possible to use setInterval() to call a method which does the call every X number of milliseconds. However, what happens if my AJAX call takes more than 10 seconds? I still want it to complete the last request and I don't want another call to be instigated when there is already one in progress. This

问题 I want to delay the evaluation of a call to a member function of an instance of a class until this instance actually exists. Minimum working example: class TestClass: def __init__(self, variable_0): self.__variable_0 = variable_0 def get_variable_0(self): return self.__variable_0 delayed_evaluation_0 = test_class.get_variable_0() # What should I change here to delay the evaluation? test_class = TestClass(3) print(delayed_evaluation_0.__next__) # Here, 'delayed_evaluation_0' should be

问题 How might one get a function to be called at given time and date? For example, I would like to store some values of some variables at midnight (and clear them to zero) so they can be compared with the previous days values. How might I accomplish this in Objective-C? Thanks, Jack 回答1: You've got quite a few options, depending on what you're after. The obvious place to start is NSTimer. There's also the performSelector withDelay function family. Lastly, a cool extension I sometimes use, delayed

问题 I have an NServiceBus application for which a given message may not be processed due to some external event not having taken place. Because this other event is not an NSB event I can't implement sagas properly. However, rather than just re-queuing the message (which would cause a loop until that external event has occurred), I'm wrapping the message in another message (DelayMessage) and queuing that instead. The DelayMessage is picked up by a different service and placed in a database until