Enables the use of time calculations within Time itself

Methods
Classes and Modules
Module ActiveSupport::CoreExtensions::Time::Calculations::ClassMethods
Public Instance methods
advance(options)

Uses Date to provide precise Time calculations for years, months, and days. The options parameter takes a hash with any of these keys: :months, :days, :years.

    # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 50
50:         def advance(options)
51:           d = ::Date.new(year + (options.delete(:years) || 0), month, day)
52:           d = d >> options.delete(:months) if options[:months]
53:           d = d +  options.delete(:days)   if options[:days]
54:           change(options.merge(:year => d.year, :month => d.month, :mday => d.day))
55:         end
ago(seconds)

Returns a new Time representing the time a number of seconds ago, this is basically a wrapper around the Numeric extension Do not use this method in combination with x.months, use months_ago instead!

    # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 59
59:         def ago(seconds)
60:           seconds.until(self)
61:         end
at_beginning_of_day()

Alias for beginning_of_day

at_beginning_of_month()

Alias for beginning_of_month

at_beginning_of_quarter()
at_beginning_of_week()

Alias for beginning_of_week

at_beginning_of_year()

Alias for beginning_of_year

at_end_of_month()

Alias for end_of_month

at_midnight()

Alias for beginning_of_day

beginning_of_day()

Returns a new Time representing the start of the day (0:00)

This method is also aliased as midnight at_midnight at_beginning_of_day
     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 143
143:         def beginning_of_day
144:           (self - self.seconds_since_midnight).change(:usec => 0)
145:         end
beginning_of_month()

Returns a new Time representing the start of the month (1st of the month, 0:00)

This method is also aliased as at_beginning_of_month
     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 151
151:         def beginning_of_month
152:           #self - ((self.mday-1).days + self.seconds_since_midnight)
153:           change(:mday => 1,:hour => 0, :min => 0, :sec => 0, :usec => 0)
154:         end
beginning_of_quarter()

Returns a new Time representing the start of the quarter (1st of january, april, july, october, 0:00)

This method is also aliased as at_beginning_of_quarter
     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 166
166:         def beginning_of_quarter
167:           beginning_of_month.change(:month => [10, 7, 4, 1].detect { |m| m <= self.month })
168:         end
beginning_of_week()

Returns a new Time representing the "start" of this week (Monday, 0:00)

This method is also aliased as monday at_beginning_of_week
     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 129
129:         def beginning_of_week
130:           days_to_monday = self.wday!=0 ? self.wday-1 : 6
131:           (self - days_to_monday.days).midnight
132:         end
beginning_of_year()

Returns a new Time representing the start of the year (1st of january, 0:00)

This method is also aliased as at_beginning_of_year
     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 172
172:         def beginning_of_year
173:           change(:month => 1,:mday => 1,:hour => 0, :min => 0, :sec => 0, :usec => 0)
174:         end
change(options)

Returns a new Time where one or more of the elements have been changed according to the options parameter. The time options (hour, minute, sec, usec) reset cascadingly, so if only the hour is passed, then minute, sec, and usec is set to 0. If the hour and minute is passed, then sec and usec is set to 0.

    # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 35
35:         def change(options)
36:           ::Time.send(
37:             self.utc? ? :utc : :local, 
38:             options[:year]  || self.year, 
39:             options[:month] || self.month, 
40:             options[:mday]  || self.mday, 
41:             options[:hour]  || self.hour, 
42:             options[:min]   || (options[:hour] ? 0 : self.min),
43:             options[:sec]   || ((options[:hour] || options[:min]) ? 0 : self.sec),
44:             options[:usec]  || ((options[:hour] || options[:min] || options[:sec]) ? 0 : self.usec)
45:           )
46:         end
end_of_month()

Returns a new Time representing the end of the month (last day of the month, 0:00)

This method is also aliased as at_end_of_month
     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 158
158:         def end_of_month
159:           #self - ((self.mday-1).days + self.seconds_since_midnight)
160:           last_day = ::Time.days_in_month( self.month, self.year )
161:           change(:mday => last_day,:hour => 0, :min => 0, :sec => 0, :usec => 0)
162:         end
in(seconds)

Alias for since

last_month()

Short-hand for months_ago(1)

     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 119
119:         def last_month
120:           months_ago(1)
121:         end
last_year()

Short-hand for years_ago(1)

     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 108
108:         def last_year
109:           years_ago(1)
110:         end
midnight()

Alias for beginning_of_day

monday()

Alias for beginning_of_week

months_ago(months)

Returns a new Time representing the time a number of specified months ago

    # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 71
71:         def months_ago(months)
72:           months_since(-months)
73:         end
months_since(months)
    # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 75
75:         def months_since(months)
76:           year, month, mday = self.year, self.month, self.mday
77: 
78:           month += months
79: 
80:           # in case months is negative
81:           while month < 1
82:             month += 12
83:             year -= 1
84:           end
85: 
86:           # in case months is positive
87:           while month > 12
88:             month -= 12
89:             year += 1
90:           end
91: 
92:           max = ::Time.days_in_month(month, year)
93:           mday = max if mday > max
94: 
95:           change(:year => year, :month => month, :mday => mday)
96:         end
next_month()

Short-hand for months_since(1)

     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 124
124:         def next_month
125:           months_since(1)
126:         end
next_week(day = :monday)

Returns a new Time representing the start of the given day in next week (default is Monday).

     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 137
137:         def next_week(day = :monday)
138:           days_into_week = { :monday => 0, :tuesday => 1, :wednesday => 2, :thursday => 3, :friday => 4, :saturday => 5, :sunday => 6}
139:           since(1.week).beginning_of_week.since(days_into_week[day].day).change(:hour => 0)
140:         end
next_year()

Short-hand for years_since(1)

     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 113
113:         def next_year
114:           years_since(1)
115:         end
seconds_since_midnight()

Seconds since midnight: Time.now.seconds_since_midnight

    # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 28
28:         def seconds_since_midnight
29:           self.hour.hours + self.min.minutes + self.sec + (self.usec/1.0e+6)
30:         end
since(seconds)
 Returns a new Time representing the time a number of seconds since the instance time, this is basically a wrapper around

the Numeric extension. Do not use this method in combination with x.months, use months_since instead!

This method is also aliased as in
    # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 65
65:         def since(seconds)
66:           seconds.since(self)
67:         end
tomorrow()

Convenience method which returns a new Time representing the time 1 day since the instance time

     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 183
183:         def tomorrow
184:           self.since(1.day)
185:         end
years_ago(years)

Returns a new Time representing the time a number of specified years ago

     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 99
 99:         def years_ago(years)
100:           change(:year => self.year - years)
101:         end
years_since(years)
     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 103
103:         def years_since(years)
104:           change(:year => self.year + years)
105:         end
yesterday()

Convenience method which returns a new Time representing the time 1 day ago

     # File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 178
178:         def yesterday
179:           self.ago(1.day)
180:         end