def posts_dates(options = {})
      params = prepare_posts_params(options.clone, [:tag])
      response = request(API_PATH_POSTS_DATES, params)
      parse_posts_dates_response(response.body)
    end
def posts_dates(options = {})
      params = prepare_posts_params(options.clone, [:tag])
      response = request(API_PATH_POSTS_DATES, params)
      parse_posts_dates_response(response.body)
    end
Returns a list of dates with the number of posts at each date.

   # get number of posts per date
   d.posts_dates
   # => { '2008-05-05' => 12, '2008-05-06' => 3, ... }

   # get number posts per date tagged as ruby
   d.posts_dates(:tag => WWW::Delicious::Tag.new('ruby'))
   # => { '2008-05-05' => 10, '2008-05-06' => 3, ... }


 === Options
 <tt>:tag</tt>:: a tag to filter by. It can be either a <tt>WWW::Delicious::Tag</tt> or a +String+.