Run javascript for loop on delay

Question

On my page I'm using MaxMind to populate a users long/lat.

I'm also using a script (containing the haversine formula) to take the users long/lat and assign a distance parameter to an object that relates to a store location.

Once the distance has been stored I want to run the following loop

for(i=0; i<cities.length; i++){
    var newLat = cities[i].lat;
    var newLon = cities[i].lon;
    getDistanceFromLatLonInKm(userLat,userLon,newLat,newLon);
    var lowest = 1000
    if(cities[i].distance< lowest){lowest = cities[i].distance}
}

    cities.sort(function(a, b) {
    return a.distance - b.distance;
    })[0]
        var div = document.getElementById('test');
            if(cities[0].fax == null){
                div.innerHTML = div.innerHTML + cities[0].street + '<br />' + cities[0].city + '<br />' + cities[0].postal + '<br /><b>Phone:</b>' + cities[0].phone;
            }else{div.innerHTML = div.innerHTML + cities[0].street + '<br />' + cities[0].city + '<br />' + cities[0].postal + '<br /><b>Phone:</b>' + cities[0].phone + '<br /><b>Fax:</b>' + cities[0].fax;

            }

The only thing is that since there's a delay on the coordinates showing up, the loop can't run right away. How can I run this loop after the coordinates are populated?

Can you share the code which is getting the latitude and longitude? You can have a construct where you wrap the for loop inside the functionality of getting the latitude.. by saying something like if lat and long = actual values, { for loop } — omar-ali
– omar-ali, Commented Dec 9, 2013 at 19:02

Luaan · Accepted Answer · 2013-12-09 19:02:01Z

1

You can use the setTimeout function, eg.:

setTimeout(function () { yourCode... }, 5000);

However, that is rarely the proper solution. Instead, you should look in the API of your data source, it probably has a callback function you can use to get notified of the data being available. That's the proper way to wait for data. If there's no such way, you'll have to use setTimeout (in fact, call it again if data isn't available yet when you get inside the delayed code).

answered Dec 9, 2013 at 19:02

Luaan

64.1k7 gold badges107 silver badges126 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Brant Barton Over a year ago

I'll take a look at the docs, but this works great for what I need. Thanks!

Collectives™ on Stack Overflow

Run javascript for loop on delay

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related