Array#paginate: adds pagination functionality using the WillPaginate gem to a Ruby Array

paginate_array.rb

require 'will_paginate'

class Array
  def paginate(all = nil, options = {})
    options[:page] = (options[:page].to_i == 0) ? 1 : options[:page].to_i
    options[:per_page] = (options[:per_page].to_i == 0) ? 30 : options[:per_page].to_i
    pagination_array = WillPaginate::Collection.new(options[:page], options[:per_page], self.size)
    start_index = pagination_array.offset
    end_index = start_index + (options[:per_page] - 1)
    array_to_concat = self[start_index..end_index]
    array_to_concat.nil? ? [] : pagination_array.concat(array_to_concat)
  end
end