Pagination helper for Ohm models.

paginate.rb

def paginate(collection, options = {})
  start = options[:start] || 0
  limit = options[:limit] || 0
  order = options[:order]

  rest = collection.size > (start + limit)
  page = collection.sort(order: order, start: start, limit: limit)

  [rest, page]
end

usage.rb

# Let's say there are 40 users.
User.all.size # => 40

# We can paginate them with this expression.
remnant, discs = paginate(User.all, order: "DESC", limit: 10)

# Now, discs has a collection of instances of User, and remnant is a
# boolean that states whether there are more pages to display.