detach

Detach local database .mdf, copy, attach the new file

由 此生再无相见时 提交于 2019-12-12 17:36:27
问题 I tried to detach my local database .mdf copy it in another folder and attach the new file at launch and copy to the older folder when closing. It seems to works at launch but i have an error when the form closing : The process cannot access the file 'C:\ProgramData\MyData\db1.mdf' because it is being used by another process. That's my code : public Form() { InitializeComponent(); DetachDatabase(); CopyDb(); AttachDatabase(); AppDomain.CurrentDomain.SetData("DataDirectory", Data.MyNewFolder);

std::thread finishes before I can detach it

由 廉价感情. 提交于 2019-12-11 01:44:54
问题 If I create an std::thread that terminates before I am able to call detatch() on it, what is the expected behavior? Should an exception be thrown due to the fact that joinable is already false? If this is so, then is there a way to create a thread which is initialized into a detached state so that I can avoid this error? Example: void func() { // do something very trivial so that it finishes fast int a = 1; } void main() { thread trivial(func); trivial.detach(); } I realize that it isn't

Detaching a Fragment not triggering onSaveInstanceState()

由 最后都变了- 提交于 2019-12-08 19:34:25
问题 My Android application has an ActionBar that changes which Fragment occupies a certain FrameLayout . I am trying to use onSaveInstanceState to save the state of a Fragment when the tab is changed, so that it can be recovered in onCreateView . The problem is, onSaveInstanceState is never called. The Fragment 's onDestroyView and onCreateView methods are called, but the Bundle supplied to onCreateView remains null. Can someone please explain to me when onSaveInstanceState is actually called,

Using std::thread with std::mutex

由 ▼魔方 西西 提交于 2019-12-06 11:27:55
问题 I am trying mutex lock with independent threads. The requirement is, I have many threads which will run independently and access/update a common recourse. To ensure that the recourse is updated via a single task, I used mutex. However this is not working. I have pasted code, a representation of what I am trying to do below: #include <iostream> #include <map> #include <string> #include <chrono> #include <thread> #include <mutex> #include <unistd.h> std::mutex mt; static int iMem = 0; int

Using std::thread with std::mutex

由 霸气de小男生 提交于 2019-12-04 17:46:09
I am trying mutex lock with independent threads. The requirement is, I have many threads which will run independently and access/update a common recourse. To ensure that the recourse is updated via a single task, I used mutex. However this is not working. I have pasted code, a representation of what I am trying to do below: #include <iostream> #include <map> #include <string> #include <chrono> #include <thread> #include <mutex> #include <unistd.h> std::mutex mt; static int iMem = 0; int maxITr = 1000; void renum() { // Ensure that only 1 task will update the variable mt.lock(); int tmpMem =

Pthread create as detached

由 隐身守侯 提交于 2019-12-04 14:00:06
问题 I have a problem creating a thread as detached. Here's the code I wrote: void* testFunction() { pthread_attr_t attr; int chk,rc; pthread_attr_init(&attr); printf("thread_attr_init: %d\n",rc); pthread_attr_getdetachstate(&attr, &chk); printf("thread_attr_getdetachedstate: %d\n",rc); if(chk == PTHREAD_CREATE_DETACHED ) printf("Detached\n"); else if (chk == PTHREAD_CREATE_JOINABLE) printf("Joinable\n"); return NULL; } int main (int argc, const char * argv[]) { pthread_t thread1; pthread_attr_t

Disable warning about detached HEAD

由 北战南征 提交于 2019-12-03 01:11:33
In git if you checkout a commit directly you get a big fat warning starting with: "You are in 'detached HEAD' state. You can look around ..." It's fine - I intend to be in detached HEAD state. However I am using this in a script and I don't want this warning in the output logs but I do want the normal output. My "ugly" workaround now is to run the same command twice, first with -q to hide the warning, and one more time to get the normal output: HEAD is now at deadbeef... Message since the warning is only printed once. Can the warning be disabled so I can avoid workarounds or parsing the output

Restore Multiple Detached Elements in JQuery

由 女生的网名这么多〃 提交于 2019-12-02 04:54:01
问题 I have a link inside of a table that, when clicked, removes the entire parent tr . I am using detach() for the purposes of restoring that item later based on an event. Typically, one would store this as a variable, then recall it later and have it append() later, but what if I need to restore multiple rows? There is no .= method to add more to a variable is there? JSFiddle = http://jsfiddle.net/nErDy/ 回答1: Why not use an array? var deleted = []; //Allow people to delete rows $('a.delete')

FragmentTransaction .attach and .detach for Actionbar tabs

由 旧城冷巷雨未停 提交于 2019-11-30 06:59:57
问题 I'm trying to get the code here to work. It compiles fine. It will run. And it will load tab 1 (of 3). However, when I click on the 2nd or 3rd tab, I get this: java.lang.NoSuchMethodError: android.app.FragmentTransaction.detach this happens in the code here public void onTabUnselected(Tab tab, FragmentTransaction ft) { if (mFragment != null) { //ft.detach(mFragment); //requires API Level 13 ft.remove(mFragment); //this does not do the same thing as detach } } I found that detach is only
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