problem description python3 uses process communication, I crawled to some agents, need to check availability, use the validator function, and then I opened the process pool to run the validator function. Validator will put the available agents to Queu...
suppose I now have a process that prints "hello world " in a loop. From a process perspective alone, will it be assigned a port number when I start it? in other words, is the port number only available when I get the process bound, or is it randomly ...
when any thread X executes the wait () and notify () methods on any thread Y, it needs to acquire the lock first. it is said that the locking mechanism is to solve the critical resource problem, so does it allow threads to start and pause access to any ...
Why do pipes have to be half-duplex from a source point of view? ...
Python version: 2.7 now you need to use tornado to implement a function like this: 1. Create multiple processes using tornado. 2. The method of reading configuration information from the database is written in the process, and the read configurat...
---- pages three three.js Page({ ** * * data: { name:"", age:"", sex:"" }, onLoad: function (options) { this.setWatch(this); console.log(this) }, watch:{ name(){ c...
<?php test.php @unlink( tmp abc.php ); var_dump(@include_once( tmp abc.php )); swritefile( tmp abc.php , <?php echo 123; ); var_dump(file_exists( tmp abc.php )); var_dump(include_once( tmp abc.php )); function swritefile($filena...
POI is used in the Java project to export millions of pieces of data to Excel, but a memory overflow exception occurs. there are the following problems to consider the number of POI exports is limited to 6w + A large amount of data will lead to m...
scenario: A div sets the content beyond the display scroll bar, but the scroll bar does not appear until the mouse is over the content block. It does not appear by default, just like the scroll bar of the QQ chat interface . paste my code first: ...
now there is a scheduled task in the project, which is executed in the early hours of every day, but one day the amount of data is so large that the task has not been finished for one day, and has been executed until the next day, and then the task begi...