gistfile1.rb

module Spinner
  def spinner(&block)
    return unless block_given?
    chars = %w{ | / - \\ }
    t = Thread.new { yield if block_given? }
    while t.alive?
      print chars[0]
      sleep 0.1
      print "\b"
      chars.push chars.shift
    end
    #t.join
    return t.value
  end
end