Epigene/Loop over users.rb

## Loop over users.rb
last_posts = []
User.all.each |user|
  last_posts << user.posts.order(created_at: :asc).last
end

# oops, some users have no posts and the array has nils
last_posts = last_posts.compact

# now to have them in correct order
last_posts = last_posts.sort{ |x, y| y.created_at <=> x.created_at }
	last_posts = []
	User.all.each \|user\|
	last_posts << user.posts.order(created_at: :asc).last
	end

	# oops, some users have no posts and the array has nils
	last_posts = last_posts.compact

	# now to have them in correct order
	last_posts = last_posts.sort{ \|x, y\| y.created_at <=> x.created_at }