Datas no Ruby

Programação Ruby on Rails
#1

É possível diminuir datas no Ruby? Como?

#2

The Ruby Programming Language, capitulo 9, seção 4:

# Time arithmetic
now = Time.now          # Current time
past = now - 10         # 10 seconds ago. Time - number => Time
future = now + 10       # 10 seconds from now Time + number => Time
future - now            # => 10  Time - Time => number of seconds

# Time comparisons
past <=> future         # => -1
past < future           # => true
now >= future           # => false
now == now              # => true

Ou…

Google

#3