Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript Using the Geolocation API in JavaScript

chris ingvartsen
PLUS
chris ingvartsen
Courses Plus Student 52 Points
Posted by chris ingvartsen
chris ingvartsen
Courses Plus Student 52 Points

How do i sort location by nearest?

If i were to save the lat and lon values in a SQL database and foreach over them to return the locations. How would i order them by nearest? I cant figure this out!

1 Answer

Steven Parker
Steven Parker
231,184 Points
Steven Parker
Steven Parker
231,184 Points

I"m not sure how SQL comes into this, but if you're using "forEach" it sounds like you're working with an array. In that case, you could use the ".sort()" method with a custom compare function.

Your compare function could use the standard formula for distance calculation (sqrt(deltax**2 + deltay**2)) and then subtract the distances to create the sorting order.