flush

问题 I used flush() function in infinite loop in my php page, it echoes a text each second. when i open the page in browser it works! but when i load it via jquery ajax it doesn't response! php page <?php if (ob_get_level() == 0) ob_start(); for ($i = 0; true/*$i<10*/; $i++){ echo "<br> Line to show. $i"; echo str_pad('',4096)."\n"; ob_flush(); flush(); sleep(1); } ob_end_flush(); ?> jquery code $.ajax({ url: 'res.php', beforeSend: function( ) { $('#mydiv').html('loading...'); }, success: function

问题 Just a quick question, but is the flush necessary in this code? Note this would be inside of a JPA transaction. User user = new User(); em.persist(user); em.flush; User aUser = em.find(User.class,user.getId()); assert(user.equals(aUser)); Or is will it work without the flush? User user = new User(); em.persist(user); User aUser = em.find(User.class,user.getId()); assert(user.equals(aUser)); Or same question but a little more involved example: User user = em.find(User.class,id); user.setName(

问题 I have Perl script which appends a new line to the existing file every 3 seconds. Also, there is a C++ application which reads from that file. The problem is that the application begins to read the file after the script is done and file handle is closed. To avoid this I want to flush after each line append, but I'm new to Perl and don't know how to do that. 回答1: Try: use IO::Handle; $fh->autoflush; This was actually posted as a way of auto-flushing in an early question of mine, which asked

问题 I've found something similar like this in a piece of code: use IO::Handle; autoflush STDOUT 1; print ''; Is the purpose of "print" to empty a possibly filled buffer? 回答1: The print call should be a wasted system call. perlvar states, "If set to nonzero, forces a flush right away and after every write or print on the currently selected output channel." The code in this example should turn on autoflush, causing a flush, then add noting to the STDOUT buffer and cause a flush. There may be

问题 Is there some magic required to obtain a "zlib sync flush" when using boost::iostreams::zlib_compressor ? Just invoking flush on the filter, or strict_sync on a filtering_ostream containing it doesn't see to do the job (ie I want the compressor to flush enough that the decompressor can recover all the bytes consumed by the compressor so far, without closing the stream). Looking at the header, there seem to be some "flush codes" defined (notably a sync_flush ) but it's unclear to me how they

问题 Is there some magic required to obtain a "zlib sync flush" when using boost::iostreams::zlib_compressor ? Just invoking flush on the filter, or strict_sync on a filtering_ostream containing it doesn't see to do the job (ie I want the compressor to flush enough that the decompressor can recover all the bytes consumed by the compressor so far, without closing the stream). Looking at the header, there seem to be some "flush codes" defined (notably a sync_flush ) but it's unclear to me how they

问题 I try to user the onFlush Event in Doctrine to persist a new entity, but it leads to an infinite loop when trying to persist. Here is what I do in the Listener: $countusers = $em->getRepository('DankeForumBundle:NotificationUser')->countNotificationsByDeal($entity); if ($countusers > 0) { $notification = new NotificationAction(); $notification->setDeal($entity); $notification->setDatepost(new \DateTime()); $notification->setNotificationtype(NotificationAction::TYPE_TOP_DEAL); // $em is set to

问题 I am (re-)learning C-programming, so the following question is for the sake of understanding. Using scanf() I learned (or found out myself, it does not really take long to come to this point) that flushing stdin is a good thing. I further found out (with your help) that fflush(stdin) is not a standard thing to do and e.g. does not work with gcc. I moved on to use the code snippet below for flushing stdin. It was provided here (thanks). It works fine, if stdin is not empty. Yet, if stdin is

问题 In the following program I am trying to understand how to read and write files. #include<iostream> #include<fstream> using namespace std; int main() { fstream myfile; string str1; myfile.open("H:/input_file.txt"); if(myfile.is_open()) { myfile<<"test1 writing files"<<" "; myfile>>str1; cout<<str1<<endl; } return 0; } Why I don't get any output on the console even though "test1 writing files" is written into a file? 回答1: The file will need to be opened for both read and write (I'm sorry,

问题 I have two different applications that share the same database. The problem is that when I have an application change something in the database, the other does not update. I tried to make a session.flush() but it didn't work. The only way is to close the entire session and recreate it, but of course, that takes too long. 回答1: Short answer: issue a session.refresh(obj) every time you want to display some object. It will force Hibernate to go to the database. Another solution is to use a