sleep

问题 sleep(1); #waits/sleeps for one second then continue running the script Q1. How to make this 1/100 of a second? which of these work: 0,01 or 0.01 or .01 ? Q2. What are alternatives? wait(); or snap(); ?? how do they differ (more/less precise)? 回答1: Q1. How to make this 1/100 of a second? which of these work: 0,01 or 0.01 or .01 ? None of the above! usleep is what you want for fractions of a second. usleep(100000) will sleep for one tenth of one second. Your other options are time_nanosleep

问题 Currently I am coding a project that requires precise delay times over a number of computers. Currently this is the code I am using I found it on a forum. This is the code below. { LONGLONG timerResolution; LONGLONG wantedTime; LONGLONG currentTime; QueryPerformanceFrequency((LARGE_INTEGER*)&timerResolution); timerResolution /= 1000; QueryPerformanceCounter((LARGE_INTEGER*)&currentTime); wantedTime = currentTime / timerResolution + ms; currentTime = 0; while (currentTime < wantedTime) {

问题 Im implementing a delay system so that any IP i deem abusive will automatically get an incremental delay via Sleep(). My question is, will this result in added CPU usage and thus kill my site anyways if the attacker just keeps opening new instances while being delayed? Or is the sleep() command use minimal CPU/memory and wont be much of a burden on a small script. I dont wish to flat out deny them as i'd rather they not know about the limit in an obvious way, but willing to hear why i should.

问题 Hello is there a alternative to time.sleep? Because I want to let my LEDs blink in the exact amount of Hz what is not able because to call time.sleep needs time too, so the blinking needs more time than expected. #!/usr/bin/python import RPi.GPIO as GPIO import time from threading import Thread GPIO.setmode(GPIO.BOARD) GPIO.setup(32, GPIO.IN) def blink(port, hz): GPIO.setup(port, GPIO.OUT) while True: if GPIO.input(32) == 1: //lever activated? GPIO.output(port, GPIO.HIGH) time.sleep(0.5/hz)

问题 Hello is there a alternative to time.sleep? Because I want to let my LEDs blink in the exact amount of Hz what is not able because to call time.sleep needs time too, so the blinking needs more time than expected. #!/usr/bin/python import RPi.GPIO as GPIO import time from threading import Thread GPIO.setmode(GPIO.BOARD) GPIO.setup(32, GPIO.IN) def blink(port, hz): GPIO.setup(port, GPIO.OUT) while True: if GPIO.input(32) == 1: //lever activated? GPIO.output(port, GPIO.HIGH) time.sleep(0.5/hz)

问题 I'm making a puzzle solving function which uses an array of puzzle pieces in their current shuffled order. Each piece has an id which points to the correct position in the array. I set overlay colors on the pieces that are about to be swapped. I want for there to be a delay between the pieces being colored and then swapped. function solvePuzzle() { while (rezolvat == false) // while all pieces are not in correct position for (var i = 0; i < _piese.length; i++) { // iterates through array of

问题 is it possible to use sleep() (or some other function) to wait before execution? I have for example: <div>bla bla</div> <?php $a echo $a; ?> some divs and html <?php $b echo $b; ?> How to execute the first php script say 5 sec after the page has loaded but to show everything else as the page loads? If I use sleep() before the first php it will delay the whole page from loading. 回答1: You want to use AJAX for this. Example using jQuery: <div id="content"> <-- You want to load something here

问题 Please consider the following pieces of code: In the first one i call a function which creates an animation. i do that with a certain time interval: start:; [self animationMethod]; [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:3]]; //sleep(3); goto start; In the second one i create an animation - (void)animationMethod { CAKeyframeAnimation *myAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"]; CGMutablePathRef curvedPath = CGPathCreateMutable();

问题 Please consider the following pieces of code: In the first one i call a function which creates an animation. i do that with a certain time interval: start:; [self animationMethod]; [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:3]]; //sleep(3); goto start; In the second one i create an animation - (void)animationMethod { CAKeyframeAnimation *myAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"]; CGMutablePathRef curvedPath = CGPathCreateMutable();

问题 I want to do the following: if $start is a multiple of 28, the script will pause for 20 seconds and then continue work. For this I wrote: set_time_limit(0); ini_set('display_errors', 1); error_reporting(E_ALL); date_default_timezone_set("Europe/Moscow"); $start = 0; $end = 2000; for($start = 0; $start < 20; $start++){ if($start % 28 == 0){sleep(20);echo 'sleep ';} echo date('H:i:s').'<br>'; } When I use it, I get: sleep 14:51:01 14:51:01 14:51:01 14:51:01 14:51:01 14:51:01 14:51:01 14:51:01