Question

Why this is not working for me:

class Time
  # Return the time difference (as a Float) between now and a specified older Time or parse-able String.
  #   a = Time.now
  #   Time.since(a) # => 8.920116
  #   a.since(a) # => 0.0
  #   Time.since '11:30' # => 28.111561
  #   Time.since '9am' # => 9138.288258
  def self.since(older_time)
    Time.now.since(older_time)
  end

  def since(older_time)
    self - (older_time.kind_of?(Time) ? older_time : Time.parse(older_time))
  end
end

puts Time.since '9am'

Error message:

.rb:13:in since': undefined method
parse’ for Time:Class (NoMethodError)
from TimeSince.rb:9:in since' from
TimeSince.rb:17:in‘

Answer 1

You’re not doing require 'time' before it, and so the Time.parse method (and every other method in the Time class) will be unavailable.