For example I have this data:

headings = { 
         :heading1 => { :weight => 60, :show_count => 0}
         :heading2 => { :weight => 10, :show_count => 0}
         :heading3 => { :weight => 20, :show_count => 0}
         :heading4 => { :weight => 10, :show_count => 0}
       }
total_views = 0

Now I want to serve each heading based on their weightages. For instance, for first 10 requests/iterations, heading1, heading3, heading2 and heading4 would be served 6, 2, 1, and 1 times respectively in order (by weight).

For every iteration show_count of served heading will increment by one and total_views will also increment globally.

Could you please suggest an algorithm or some ruby code to handle this?