ruby-on-rails - 如何识别给定的日、月、年组合是否为合法日期？

Question

给定 3 个数字:DD、MM、YYYY，判断它们是否包含合法日期的最简单方法是什么？

例子:

14, 05, 2011     =>     Legal
29, 02, 2011     =>     Illegal
29, 02, 2012     =>     Legal
35, 11, 1989     =>     Illegal
14, 18, 2011     =>     Illegal
14, 00, 2011     =>     Illegal
00, 11, 1979     =>     Illegal
31, 11, 1979     =>     Illegal

Answer 1

您可以使用 valid_date? 但它是 YYYY, MM, DD:

irb(main):015:0> require 'date'
=> true
irb(main):021:0> Date::valid_date?(2011,05,14)
=> true
irb(main):022:0> Date::valid_date?(2011,02,29)
=> false
irb(main):023:0> Date::valid_date?(2012,02,29)
=> true