Execute a script every random number with nodejs-CodePudding

I want to execute a script with a random interval between 11 to 13 minutes. I tried this code, but the script is execute in much less than 11 minutes. Is my calculation wrong?

setInterval(function() {
  // code to be executed
  const script = spawn('node', ['index.js']);

}, 1000 * 60 * Math.floor(Math.random() * 3)   11); // 1000 milliseconds * 60 seconds * random number of minutes between 11 and 13

CodePudding user response：

First thing, you are missing parenthesis. It should be 1000 * 60 * (Math.floor(Math.random() * 3) 11) instead of 1000 * 60 * Math.floor(Math.random() * 3) 11)

Secondly, Math.floor(Math.random() * 3) can only take 3 possible values (0, 1 or 2), so your script will run either every 11, 12 or 13 minutes. If you want more possible values between 11 and 13 minutes, you can compute the time interval this way: Math.floor(1000 * 60 * (Math.random() * 3 11)) to have many possible values between 11 and 13 minutes.

This will do the job:

setInterval(function() {
  // code to be executed
  const script = spawn('node', ['index.js']);

}, Math.floor(1000 * 60 * (Math.random() * 3   11)); // 1000 milliseconds * 60 seconds * random number of minutes between 11 and 13