Convert 12 hr time to 24 hr format in Ruby

Question

How do I convert "11am" and "10pm" into "11:00" and "22:00"? Is there a simple way using the date and time classes?

Answer 1

The Time class has no parse method, but DateTime has.

require 'date'
DateTime.parse("11pm").strftime("%H:%M") #=> "23:00"