Execute Specified Function Every X Seconds

Execute specified function every X seconds

Use System.Windows.Forms.Timer.

private Timer timer1; 
public void InitTimer()
{
    timer1 = new Timer();
    timer1.Tick += new EventHandler(timer1_Tick);
    timer1.Interval = 2000; // in miliseconds
    timer1.Start();
}

private void timer1_Tick(object sender, EventArgs e)
{
    isonline();
}

You can call InitTimer() in Form1_Load().

Calling a method every x minutes

var startTimeSpan = TimeSpan.Zero;
var periodTimeSpan = TimeSpan.FromMinutes(5);

var timer = new System.Threading.Timer((e) =>
{
    MyMethod();   
}, null, startTimeSpan, periodTimeSpan);

Edit - this answer is out of date. See https://stackoverflow.com/a/70887955/426894

Run function every 10 seconds

follow this :

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }
    private void addFirstSlide()
    {
        PowerPoint.Slide firstSlide =  Globals.ThisAddIn.Application.ActivePresentation.Slides[1];
        PowerPoint.Shape textBox2 = firstSlide.Shapes.AddTextbox(
        Office.MsoTextOrientation.msoTextOrientationHorizontal, 50, 50, 500, 500);
        textBox2.TextFrame.TextRange.InsertAfter("firstSlide");
    }
    private void Form1_Load(object sender, EventArgs e)
    {
        timer1.Interval = 1000;
        timer1.Enabled = true;
    }

    private void timer1_Tick(object sender, EventArgs e)
    {
        addFirstSlide();
    }
}
}

What is the best way to repeatedly execute a function every x seconds?

If your program doesn't have a event loop already, use the sched module, which implements a general purpose event scheduler.

import sched, time
s = sched.scheduler(time.time, time.sleep)
def do_something(sc): 
    print("Doing stuff...")
    # do your stuff
    sc.enter(60, 1, do_something, (sc,))

s.enter(60, 1, do_something, (s,))
s.run()

If you're already using an event loop library like asyncio, trio, tkinter, PyQt5, gobject, kivy, and many others - just schedule the task using your existing event loop library's methods, instead.

Angular 6 run a function in every X seconds

Use interval from rxjs

Here's how:

import { interval, Subscription } from 'rxjs';

subscription: Subscription;

...

//emit value in sequence every 10 second
const source = interval(10000);
const text = 'Your Text Here';
this.subscription = source.subscribe(val => this.opensnack(text));

...

ngOnDestroy() {
  this.subscription.unsubscribe();
}

Alternatively, you can use setInterval which is available as method on the Window Object. So you don't need to import anything to use it.

intervalId = setInterval(this.opensnack(text), 10000);

...

ngOnDestroy() {
  clearInterval(this.intervalId);
}

Here's a SAMPLE STACKBLITZ for your ref.

flutter run function every x amount of seconds

build() can and usually will be called more than once and every time a new Timer.periodic is created.

You need to move that code out of build() like

Timer? timer;

@override
void initState() {
  super.initState();
  timer = Timer.periodic(Duration(seconds: 15), (Timer t) => checkForNewSharedLists());
}

@override
void dispose() {
  timer?.cancel();
  super.dispose();
}

Even better would be to move out such code from widgets entirely in an API layer or similar and use a StreamBuilder to have the view updated in case of updated data.

Is it possible to execute function every x seconds in python, when it is performing pool.map?

You can use a permanent threaded timer, like those from this question: Python threading.timer - repeat function every 'n' seconds

from threading import Timer,Event 

class perpetualTimer(object):

   # give it a cycle time (t) and a callback (hFunction) 
   def __init__(self,t,hFunction):
      self.t=t
      self.stop = Event()
      self.hFunction = hFunction
      self.thread = Timer(self.t,self.handle_function)

   def handle_function(self):
      self.hFunction()
      self.thread = Timer(self.t,self.handle_function)
      if not self.stop.is_set():
          self.thread.start()

   def start(self):
      self.stop.clear()
      self.thread.start()

   def cancel(self):
      self.stop.set()
      self.thread.cancel()

Basically this is just a wrapper for a Timer object that creates a new Timer object every time your desired function is called. Don't expect millisecond accuracy (or even close) from this, but for your purposes it should be ideal.

Using this your example would become:

finished = 0

def make_job():
   sleep(1)
   global finished
   finished += 1

def display_status():
   print 'finished: ' + finished

def main():
    data = [...]
    pool = ThreadPool(45)

    # set up the monitor to make run the function every minute
    monitor = PerpetualTimer(60,display_status)
    monitor.start()
    results = pool.map(make_job, data)
    pool.close()
    pool.join()
    monitor.cancel()

EDIT:

A cleaner solution may be (thanks to comments below):

from threading import Event,Thread 

class RepeatTimer(Thread):
    def __init__(self, t, callback, event):
        Thread.__init__(self)
        self.stop = event
        self.wait_time = t
        self.callback = callback
        self.daemon = True

    def run(self):
        while not self.stop.wait(self.wait_time):
            self.callback()

Then in your code:

def main():
    data = [...]
    pool = ThreadPool(45)
    stop_flag = Event()
    RepeatTimer(60,display_status,stop_flag).start()
    results = pool.map(make_job, data)
    pool.close()
    pool.join()
    stop_flag.set()

Javascript - Execute function every x seconds, but only execute function 3 times

Use setInterval and keep a counter on each run then, clear the interval when the count gets large enough.

(function() {
  var c = 0;
  var timeout = setInterval(function() {
    //do thing
    c++;
    if (c > 2) {
      clearInterval(timeout);
    }
  }, 10000);
})();

http://codepen.io/anon/pen/bNVMQy

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