var img = new Image(); img.onload = function() { alert(“Height: ” + this.height); } img.src = “http://path/to/image.jpg”; Note that it’s important to do it in the order above: First attach the handler, then set the src. If you do it the other way around, and the image is in cache, you may miss the event. … Read more
Thread has a method that does that for you join which will block until the thread has finished executing.
To wait for any process to finish Linux (doesn’t work on Alpine, where ash doesn’t support tail –pid): tail –pid=$pid -f /dev/null Darwin (requires that $pid has open files): lsof -p $pid +r 1 &>/dev/null With timeout (seconds) Linux: timeout $timeout tail –pid=$pid -f /dev/null Darwin (requires that $pid has open files): lsof -p $pid … Read more
Your suggested solution only waits for DOM readyState to signal complete. But Selenium by default tries to wait for those (and a little bit more) on page loads via the driver.get() and element.click() methods. They are already blocking, they wait for the page to fully load and those should be working ok. Problem, obviously, are … Read more
Depending on how you want to work your script you have two options. If you want the commands to block and not do anything while it is executing, you can just use subprocess.call. #start and block until done subprocess.call([data[“om_points”], “>”, diz[‘d’]+”/points.xml”]) If you want to do things while it is executing or feed things into … Read more
Normally, for internal commands PowerShell does wait before starting the next command. One exception to this rule is external Windows subsystem based EXE. The first trick is to pipeline to Out-Null like so: Notepad.exe | Out-Null PowerShell will wait until the Notepad.exe process has been exited before continuing. That is nifty but kind of subtle … Read more
JS does not have a sleep function, it has setTimeout() or setInterval() functions. If you can move the code that you need to run after the pause into the setTimeout() callback, you can do something like this: //code before the pause setTimeout(function(){ //do what you need here }, 2000); see example here : http://jsfiddle.net/9LZQp/ This … Read more
You put all threads in an array, start them all, and then have a loop for(i = 0; i < threads.length; i++) threads[i].join(); Each join will block until the respective thread has completed. Threads may complete in a different order than you joining them, but that’s not a problem: when the loop exits, all threads … Read more
For animation / cooldowns, etc: If you want to ‘wait’, but still have code running you use: pygame.time.get_ticks class Unit(): def __init__(self): self.last = pygame.time.get_ticks() self.cooldown = 300 def fire(self): # fire gun, only if cooldown has been 0.3 seconds since last now = pygame.time.get_ticks() if now – self.last >= self.cooldown: self.last = now spawn_bullet()
The wait() and notify() methods are designed to provide a mechanism to allow a thread to block until a specific condition is met. For this I assume you’re wanting to write a blocking queue implementation, where you have some fixed size backing-store of elements. The first thing you have to do is to identify the … Read more