Hi I am quite a newbie in Ruby. I want to sort a list of locations by relative distance (shortest to farthest relative to my location) on the fly. For example, let say I am at x and y coordinate, I have other points in the map around me. I want to be able to list the other points in terms of the shortest distance from me to the farthest. I store longitude and latitude information on the database. However, I cannot store the relative distance permanently, as (i) number of points change in real time; and (ii) I don't have relationship with the other points, which means the many-to-many tables are still empty.
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