CODEWITHSUNDEEP
javascriptrandomsetinterval
smotru
smotru

Reputation: 431

How to use setInterval with random number of milliseconds each time?

The function showRandom is executed every 1000 milliseconds but i want it to be executed every random milliseconds.. is there any solution for this ? Thank you!

var random = 1000;
setInterval(function() {random = randomizator(60000,200000);} ,1000);
setInterval(function() {showRandom(random);}, random);
function randomizator(a,b)
{
    return Math.floor(Math.random()*b) + a;
}
function showRandom(random)
{
    $('#test').text(random);
}

DEMO: jsFiddle

Upvotes: 5

Views: 9967

Answers (4)

Abdennour TOUMI
Abdennour TOUMI

Reputation: 93363

Since the implementation of setInterval(fn,PERIOD) using setTimeout is : 

     setTimeout(fn,iteration*PERIOD)  // iteration ∈ [1,2,3...,n]

So ,what you need is to use setTimeout , with randomizing iteration*PERIOD

Upvotes: 0

Mx.
Mx.

Reputation: 3665

If you want a random interval you could use setTimeout instead. Heres an example to give you an idea (not tested could contain errors): 

function setRandomInterval(){
//Add your code here
setTimeout(function(){
  setRandomInterval();
}, Math.random()*1000);

}

The problem with setInterval is, that once you've setted it the interval is fixed. You could stop the interval and start a new one but setTimeout will be the better solution.

Upvotes: 0

HIRA THAKUR
HIRA THAKUR

Reputation: 17767

    setInterval(function() {
//your code to be executed every random miliseconds
} ,random_interval());


var random_interval=function(){
return Math.random()*1000;
}

Upvotes: 1

T.J. Crowder
T.J. Crowder

Reputation: 1075079

Felix said it: If you want to change the interval every time, use setTimeout instead. Simplified example as I'm having trouble following exactly what you want your original code to do:

doTheRandom();
function doTheRandom() {
    random = randomizator(60000,200000);
    // Up to 1 second
    setTimeout(doTheRandom, randomizator(1000, 2000)); // 1-2 seconds
}

Upvotes: 5

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