wait

问题 I have this code. import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReadWriteLock; import java.util.concurrent.locks.ReentrantReadWriteLock; public class SyncProt0 { public static void main(String... args) { ExecutorService executorService = Executors.newCachedThreadPool(); ProcessStep psWorker = new ProcessStep(); ProcessStep psBoss = new ProcessStep(); Worker worker = new Worker

问题 My explicit wait isn't waiting until the element is present. It literally waits the amount of seconds I declared and then the tests still fails. If I place a implicit wait in the exact same place the test passes. From what I'm reading, it's best practise to avoid implicit waits as much as possible. Am I doing something wrong? I have made a method in the base_page like so: def _wait_for_is_displayed(self, locator, timeout): try: wait = WebDriverWait(self.driver, timeout) wait.until(expected

问题 I'm working on an interactive program which put points on a Matplotlib figure. The program lets the user move these points from their original positions with the mouse. When the user is happy on the new point positions, the program continues. Because my program project is big and covers much more than that, I have split it in several files. Here are they : functions.py import numpy as np import settings def update(val): settings.ct_plt.set_xdata(settings.x) settings.ct_plt.set_ydata(settings

问题 Let's say I have a C program which spawns some child processes using fork() and exec() . The parent keeps a list of the pid s of its children. Once in a while, it tries wait ing on them using WNOHANG and informs the user if they have terminated. The program then decides to exit. Must I explicitly kill and then wait on the remaining child processes so that they don't become zombies? According to Wikipedia: "Zombie processes should not be confused with orphan processes: an orphan process is a

问题 When I execute this program, it works well but the verification returns false. If I re-execute it, the verification works. fullpath is the directory of the backup, and refpath is the path to the original files: if (fullpath.include?(refpath) && refpath.empty? == false && fullpath.empty? == false) diffpath= "#{fullpath} #{refpath}" puts diffpath sortie = IO.popen("diff -Bb #{diffpath}").readlines #(fullpath backup_dir) #puts fullpath if sortie.empty? puts "Les fichiers -#{f} sont identiques."

问题 I have an app that does the next thing: receives GPS data through DDMS and stores them in a database and while the data are stored in the database I should also start a client thread that reads the new data stored in the database and sends it to a remote server!!! In order to receive GPS data I do something like this: lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE); locationListener = new MyLocationListener(); lm.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0

问题 Sorry from my bad english, not native speaker. I am working on a SimonSays Game on Java in a GUI. Im new to coding. I managed to make the aplication work on console, however its been a mess to make it work graphically. The program compares the LinkedLists from the generated sequence (secuenciaSimon) to the one entered by the user throught buttons (secuenciaUsuarioGUI) however, the problem is that the compare method is called by a click on any button so the LinkedList from the generated

问题 I am coding a C++ program to interact with the internet using the C++ REST SDK. I have a main function and a webCommunication function. The code is similar to below: void webCommunication(data, url) { //Communicate with the internet using the http_client //Print output } int main() { //Obtain information from user webCommunication(ans1, ans2); system("PAUSE"); } However, it seems that the main function is progressing before the webCommunication function is finished. If I make webCommunication

问题 I'm creating a Phonegap application that will perform differently on first run. The way that I am detecting the first run is by seeing of one of the database tables exists. As you can probably tell from the code below, I am checking for the error that is (probably) indicating that the table already exists, thus proving that this is not the application's first run. function databaseExists(){ var exists; database.transaction(function(tx){ tx.executeSql('CREATE TABLE GLOBAL (uid, property, value

问题 I have the following code: void fork1() { pid_t id, cpid; int status; id = fork(); if (id > 0) { // parent code cpid = wait(&status); printf("I received from my child %d this information %d\n", cpid, status); } else if (id == 0) { // child code sleep(2); exit(46); } else exit(EXIT_FAILURE); exit(EXIT_SUCCESS); } The output is: I received from my child -1 this information 0 So, why I receive the -1 error code after wait ? I was expecting to receive the value 46 as status. EDIT: I added the