propagation

问题 problem: i am working on gNodeB scheduler in 5G. so want to add new radio model in cooja simulator. such as: urban microcell street canyon: UMi - Street Canyon urban macrocell: 3D-UMa indoor factory: InF kindly if someone provide guidance. 来源： https://stackoverflow.com/questions/65000446/want-to-add-5g-radio-model-in-cooja-simulator

问题 I'd like to extend ObservableObject behavior in SwiftUI to nested classes, and I'm looking for the proper way to do it. It can be done "manually" with Combine, but I imagine there's a much cleaner way to do it using SwiftUI, and I'm hoping you can point me in the right direction. Here's what I mean… Below is a typical application of ObservableObject to make a View dynamically respond to changes to a reference type. Tapping the button toggles the showText value, which makes the text appear

问题 I have this DAO: @Transactional("transactionManager") public class DAO{ public void save(String a){...} } I have this class: public class test{ ... @Transactional(rollbackFor = Exception.class, propagation = Propagation.REQUIRES_NEW) public void save(){ DAO.save("a"); DAO.save("b"); } } I want the "save" method to rollback when it throws an exception, but it doesn't seem to work when an exception occurs it does not rollback, what is the proper approach for this? All the other methods in the

问题 Perhaps, I am doing something wrong, but I can't find a good way out for the following situation. I would like to unit test a service that uses Spring Batch underneath to execute jobs. The jobs are executed via pre-configured AsyncTaskExecutor in separate threads. In my unit test I would like to: Create few domain objects and persist them via DAO Invoke the service method to launch the job Wait until the job is completed Use DAO to retrieve domain objects and check their state Obviously, all

问题 I'd like to set up propagation in Oracle AQ (11). I'd like to propagate from queue "Q" in queue table "QT" to queue "QD" in queue table "QTD". This is my setup: DECLARE subscriber sys.aq$_agent; BEGIN DBMS_AQADM.CREATE_QUEUE_TABLE(queue_table=>'QT',multiple_consumers=>TRUE,queue_payload_type=>'RAW'); DBMS_AQADM.CREATE_QUEUE_TABLE(queue_table=>'QTD',queue_payload_type=>'RAW'); DBMS_AQADM.CREATE_QUEUE(queue_name => 'Q', queue_table => 'QT'); DBMS_AQADM.CREATE_QUEUE(queue_name => 'QD', queue

问题 I've only been working with C++ for 2~3 months and recently I found out about the identifier, final , that comes after a virtual function. To this day, I believed that omission of virtual will stop the propagation of virtualness but I was wrong. It implicitly propagates. My question is this. Why allow implicit propagation? Why can't an existence of virtual make a function virtual and absense of virtual make a function not virtual? Is is better in some circumstance? or Was it, back in the day

问题 I've been following an online tutorial on deep learning. It has a practical question on gradient descent and cost calculations where I been struggling to get the given answers once it was converted to python code. Hope you can kindly help me get the correct answer please Please see the following link for the equations used Click here to see the equations used for the calculations Following is the function given to calculate the gradient descent,cost etc. The values need to be found without

问题 Context   I am writing a thread-safe protothread/coroutine library in C++, and I am using atomics to make task switching lock-free. I want it to be as performant as possible. I have a general understanding of atomics and lock-free programming, but I do not have enough expertise to optimise my code. I did a lot of researching, but it was hard to find answers to my specific problem: What is the propagation delay/visiblity for different atomic operations under different memory orders? Current

问题 Null propagation is a very nice feature - but where and how does the actual magic happen? Where does frm?.Close() get changed to if(frm != null) frm.Close(); - Does it actually get changed to that kind of code at all? 回答1: It is done by the compiler. It doesn't change frm?.Close() to if(frm != null) frm.Close(); in terms of re-writing the source code, but it does emit IL bytecode which checks for null. Take the following example: void Main() { Person p = GetPerson(); p?.DoIt(); } Compiles to:

问题 I can't seem to get this to stop propagating.. $(document).ready(function(){ $("body").on("click","img.theater",function(event){ event.stopPropagation(); $('.theater-wrapper').show(); }); // This shouldn't fire if I click inside of the div that's inside of the // `.theater-wrapper`, which is called `.theater-container`, anything else it should. $(".theater-wrapper").click(function(event){ $('.theater-wrapper').hide(); }); }); Refer this jsfiddle 回答1: Since you are using on on the body element