# time_ago_in_words(Time.now, 1.day.ago) # => 1 day
  # time_ago_in_words(Time.now, 1.hour.ago) # => 1 hour
  def time_ago_in_words(t1, t2)
    s = t1.to_i - t2.to_i # distance between t1 and t2 in seconds
resolution = if s > 29030400 # seconds in a year
  [(s/29030400), 'years'] 
elsif s > 2419200
  [(s/2419200), 'months']
elsif s > 604800
  [(s/604800), 'weeks']
elsif s > 86400
  [(s/86400), 'days']
elsif s > 3600 # seconds in an hour
  [(s/3600), 'hours'] 
elsif s > 60
  [(s/60), 'minutes']
else
  [s, 'seconds']
end

# singular v. plural resolution
if resolution[0] == 1
  resolution.join(' ')[0...-1]
else
  resolution.join(' ')
end
end