CODEWITHSUNDEEP
javascriptnode.jstime
Lolization
Lolization

Reputation: 69

How to execute a function for each period of time?

I want a certain function to run every round hour. There is the solution of running an interval when it's a round hour but I often turn on and off my script and I don't want to have to run it exactly on a round hour. I've tried looking through some npm modules and I found one but I had some issues with it. Does anyone have a solution?

Upvotes: 3

Views: 162

Answers (2)

Tomás
Tomás

Reputation: 3561

No need for javascript! You have the perfect tool for that if you use linux!
Use cron:

$ sudo crontab -e

This will open a vim editor. Then add: 

0 * * * * node /execute/your/script.js

(basically, it will run your code every hour on its minute zero)

More info
cron: https://kvz.io/blog/2007/07/29/schedule-tasks-on-linux-using-crontab/

Upvotes: 3

Jonas Wilms
Jonas Wilms

Reputation: 138497

  const HOUR = 1000 * 60 * 60;

   function hourly() {
      //....

      setTimeout(hourly, HOUR);
  }

  setTimeout(hourly, HOUR - (new Date % HOUR));

Just calculate the next full hour when the server starts, and then shedule an hourly timer.

I admit that it might loose accuracy due to leap seconds :)

Upvotes: 1

Related Questions