-(other) — ActiveSupport::TimeWithZone

-(other)

Subtracts an interval of time and returns a new TimeWithZone object unless the other value acts_like? time. In which case, it will subtract the other time and return the difference in seconds as a Float.

Time.zone = 'Eastern Time (US & Canada)' # => 'Eastern Time (US & Canada)'
now = Time.zone.now # => Mon, 03 Nov 2014 00:26:28.725182881 EST -05:00
now - 1000          # => Mon, 03 Nov 2014 00:09:48.725182881 EST -05:00

If subtracting a Duration of variable length (i.e., years, months, days), move backward from #time, otherwise move backward from #utc, for accuracy when moving across DST boundaries.

For instance, a time - 24.hours will go subtract exactly 24 hours, while a time - 1.day will subtract 23-25 hours, depending on the day.

now - 24.hours      # => Sun, 02 Nov 2014 01:26:28.725182881 EDT -04:00
now - 1.day         # => Sun, 02 Nov 2014 00:26:28.725182881 EDT -04:00

If both the TimeWithZone object and the other value act like Time, a Float will be returned.

Time.zone.now - 1.day.ago # => 86399.999967

Parameters

other req

Source

# File activesupport/lib/active_support/time_with_zone.rb, line 333
    def -(other)
      if other.acts_like?(:time)
        getutc - other.getutc
      elsif duration_of_variable_length?(other)
        method_missing(:-, other)
      else
        result = utc.acts_like?(:date) ? utc.ago(other) : utc - other rescue utc.ago(other)
        result.in_time_zone(time_zone)
      end
    end

Defined in activesupport/lib/active_support/time_with_zone.rb line 333 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveSupport::TimeWithZone

Signature

Parameters