gistfile1.rb

  # helper method to paginate a non ActiveRecord collection like a Array
  def paginate_collection(collection, opts = {})
    opts[:per_page] ||= 20
    opts[:page] ||= 1
    opts[:page] = opts[:page].to_i
    opts[:per_page] = opts[:per_page].to_i
    returning WillPaginate::Collection.new( opts[:page], opts[:per_page], collection.size ) do |pager|
      start = (opts[:page]-1) * opts[:per_page]
      finish = start + opts[:per_page]
      pager.replace collection[ start...finish ]
    end
  end