[Ruby] Time 비교하기

time1 = Time.now

time2 = Time.now + 120 # 2분 후 

timecheck = time2 - time1

case timecheck

when 0 then p 'just now'

when 1 then p 'a second ago'

when 2..59 then p timecheck.to_s + ' seconds ago' 

when 60..119 then p 'a minute ago'  # 120 = 2 minutes

when 120..3540 then p (timecheck/60).to_i.to_s + ' minutes ago'

when 3541..7100 then p 'an hour ago'  # 3600 = 1 hour

when 7101..82800 then p ((timecheck+99)/3600).to_i.to_s + ' hours ago' 

when 82801..172000 then p 'a day ago'  # 86400 = 1 day

when 172001..518400 then p ((timecheck+800)/(60*60*24)).to_i.to_s + ' days ago'

when 518400..1036800 then p 'a week ago'

else p ((timecheck+180000)/(60*60*24*7)).to_i.to_s + ' weeks ago'

end

===> "2 minutes ago"