https://twitter.com/m_seki/status/314555709142487040 drop(nth).take(len) ??

slice.rb

module Enumerable
  def slice(nth, len)
    return to_enum(__method__, nth, len) unless block_given?
    each do |*arg|
      break if len <= 0
      if nth >= 1
        nth -= 1
        next
      end
      len -= 1
      yield(*arg)
    end
  end
end

if __FILE__ == $0
  enum = (0..10000000000).each_with_index
  p enum.slice(100, 100).find_all {|k, v| v % 15 == 0}
end