setinterval

Consider the following example: <script type="text/javascript"> function alertBox(){ alert('Hello World!'); } function doSomething(){ setInterval(alertBox(), 5000); //This is for generic purposes only }; function myFunction(){ setTimeout(doSomething(),3000); }; myFunction(); </script> What is it that causes this to execute IMMEDIATELY , rather than waiting the 3 seconds set, as well as only executing the alert ONCE , rather than at the scheduled 5 second intervals? Thanks for any help you can provide! Mason alertBox() Doesn't this look like an immediate function call? Try passing the function

How can I run a function every minute? In JavaScript I can do something like setInterval , does something similar exist in Swift? Wanted output: Hello World once a minute... Unheilig var helloWorldTimer = NSTimer.scheduledTimerWithTimeInterval(60.0, target: self, selector: Selector("sayHello"), userInfo: nil, repeats: true) func sayHello() { NSLog("hello World") } Remember to import Foundation. Swift 4: var helloWorldTimer = Timer.scheduledTimer(timeInterval: 60.0, target: self, selector: #selector(ViewController.sayHello), userInfo: nil, repeats: true) @objc func sayHello() { NSLog("hello

I am trying to make a webpage that, when it starts loading, uses an Interval to start a timer. When the page fully loads, it stops the timer, but 99% of the time i get time measurements of 0.00 or 0.01 even if it takes longer. Occasionally, it says something that makes more sense like .28 or 3.10 at some times. Here is the code if it helps: var hundredthstimer = 0; var secondplace = 0; function addinc(){ hundredthstimer += 1; if (inctimer == 100){ hundredthstimer = 0; secondplace += 1; } } var clockint = setInterval(addinc, 10); function init(){ var bconv1 = document.getElementById(

This is a pretty simple question really. If I use setInterval(something, 1000) , can I be completely sure that after, say, 31 days it will have triggered "something" exactly 60*60*24*31 times? Or is there any risk for so called drifting? Here's a benchmark you can run in Firefox: var start = +new Date(); var count = 0; setInterval(function () { console.log((new Date() - start) % 1000, ++count, Math.round((new Date() - start)/1000)) }, 1000); First value should be as close to 0 or 1000 as possible (any other value shows how "off the spot" the timing of the trigger was.) Second value is number

In JavaScript I am used to being able to call functions to be executed at a later time, like this function foo() { alert('bar'); } setTimeout(foo, 1000); This does not block the execution of other code. I do not know how to achieve something similar in Python. I can use sleep import time def foo(): print('bar') time.sleep(1) foo() but this will block the execution of other code. (Actually in my case blocking Python would not be a problem in itself, but I would not be able to unit test the method.) I know threads are designed for out-of-sync execution, but I was wondering whether something