ruby date 比較


$ irb
irb(main):001:0> require 'date'
=> true
irb(main):002:0> from = Date::strptime('2013-01-01', '%Y-%m-%d')
=> #
irb(main):004:0> to = Date::strptime('2013-01-02', '%Y-%m-%d')
=> #
irb(main):005:0> same = Date::strptime('2013-01-02', '%Y-%m-%d')
=> #
irb(main):006:0> from > to
=> false
irb(main):007:0> from < to => true
irb(main):008:0> to == same
=> true