>>(n)
click to toggle source
Backported from 1.9. The one in 1.8 leads to incorrect next_month and friends for dates
where the calendar reform is involved. It additionally prevents an infinite
loop fixed in r27013.
def >>(n)
y, m = (year * 12 + (mon - 1) + n).divmod(12)
m, = (m + 1) .divmod(1)
d = mday
until jd2 = self.class.valid_civil?(y, m, d, start)
d -= 1
raise ArgumentError, 'invalid date' unless d > 0
end
self + (jd2 - jd)
end
acts_like_date?()
click to toggle source
advance(options)
click to toggle source
Provides precise Date calculations for years,
months, and days. The options parameter takes a hash with any of
these keys: :years, :months, :weeks,
:days.
def advance(options)
options = options.dup
d = self
d = d >> options.delete(:years) * 12 if options[:years]
d = d >> options.delete(:months) if options[:months]
d = d + options.delete(:weeks) * 7 if options[:weeks]
d = d + options.delete(:days) if options[:days]
d
end
ago(seconds)
click to toggle source
Converts Date to a Time (or
DateTime if necessary) with the time portion
set to the beginning of the day (0:00) and then subtracts the specified
number of seconds.
def ago(seconds)
to_time_in_current_zone.since(-seconds)
end
at_beginning_of_day()
click to toggle source
at_beginning_of_month()
click to toggle source
at_beginning_of_quarter()
click to toggle source
at_beginning_of_week()
click to toggle source
at_beginning_of_year()
click to toggle source
at_end_of_month()
click to toggle source
at_end_of_quarter()
click to toggle source
at_end_of_week()
click to toggle source
at_end_of_year()
click to toggle source
at_midnight()
click to toggle source
beginning_of_day()
click to toggle source
Converts Date to a Time (or
DateTime if necessary) with the time portion
set to the beginning of the day (0:00)
def beginning_of_day
to_time_in_current_zone
end
beginning_of_month()
click to toggle source
Returns a new ; DateTime objects will have time
set to 0:00DateTime representing the start of
the month (1st of the month; DateTime objects
will have time set to 0:00)
def beginning_of_month
self.acts_like?(:time) ? change(:day => 1,:hour => 0, :min => 0, :sec => 0) : change(:day => 1)
end
beginning_of_quarter()
click to toggle source
Returns a new Date/DateTime representing the start of the quarter (1st of
january, april, july, october; DateTime objects
will have time set to 0:00)
def beginning_of_quarter
beginning_of_month.change(:month => [10, 7, 4, 1].detect { |m| m <= self.month })
end
beginning_of_week()
click to toggle source
Returns a new Date/DateTime representing the “start” of this week (i.e,
Monday; DateTime objects will have time set to
0:00).
def beginning_of_week
days_to_monday = self.wday!=0 ? self.wday-1 : 6
result = self - days_to_monday
self.acts_like?(:time) ? result.midnight : result
end
beginning_of_year()
click to toggle source
Returns a new Date/DateTime representing the start of the year (1st of
january; DateTime objects will have time set to
0:00)
def beginning_of_year
self.acts_like?(:time) ? change(:month => 1, :day => 1, :hour => 0, :min => 0, :sec => 0) : change(:month => 1, :day => 1)
end
change(options)
click to toggle source
Returns a new Date where one or more of the
elements have been changed according to the options parameter.
Examples:
Date.new(2007, 5, 12).change(:day => 1) # => Date.new(2007, 5, 1)
Date.new(2007, 5, 12).change(:year => 2005, :month => 1) # => Date.new(2005, 1, 12)
def change(options)
::Date.new(
options[:year] || self.year,
options[:month] || self.month,
options[:day] || self.day
)
end
default_inspect()
click to toggle source
end_of_day()
click to toggle source
Converts Date to a Time (or
DateTime if necessary) with the time portion
set to the end of the day (23:59:59)
def end_of_day
to_time_in_current_zone.end_of_day
end
end_of_month()
click to toggle source
Returns a new Date/DateTime representing the end of the month (last day of
the month; DateTime objects will have time set
to 0:00)
def end_of_month
last_day = ::Time.days_in_month( self.month, self.year )
self.acts_like?(:time) ? change(:day => last_day, :hour => 23, :min => 59, :sec => 59) : change(:day => last_day)
end
end_of_quarter()
click to toggle source
Returns a new Date/DateTime representing the end of the quarter (last day
of march, june, september, december; DateTime
objects will have time set to 23:59:59)
def end_of_quarter
beginning_of_month.change(:month => [3, 6, 9, 12].detect { |m| m >= self.month }).end_of_month
end
end_of_week()
click to toggle source
Returns a new Date/DateTime representing the end of this week (Sunday, DateTime objects will have time set to 23:59:59).
def end_of_week
days_to_sunday = self.wday!=0 ? 7-self.wday : 0
result = self + days_to_sunday.days
self.acts_like?(:time) ? result.end_of_day : result
end
end_of_year()
click to toggle source
Returns a new Time representing the end of the year
(31st of december; DateTime objects will have
time set to 23:59:59)
def end_of_year
self.acts_like?(:time) ? change(:month => 12,:day => 31,:hour => 23, :min => 59, :sec => 59) : change(:month => 12, :day => 31)
end
future?()
click to toggle source
Returns true if the Date object’s date lies in the
future.
def future?
self > ::Date.current
end
in(seconds)
click to toggle source
inspect()
click to toggle source
midnight()
click to toggle source
monday()
click to toggle source
months_ago(months)
click to toggle source
Returns a new Date/DateTime representing the time a number of specified
months ago.
def months_ago(months)
advance(:months => -months)
end
months_since(months)
click to toggle source
Returns a new Date/DateTime representing the time a number of specified
months in the future.
def months_since(months)
advance(:months => months)
end
next_month()
click to toggle source
Shorthand for months_since(1)
def next_month
months_since(1)
end
next_week(day = :monday)
click to toggle source
Returns a new Date/DateTime representing the start of the given day in next
week (default is Monday).
def next_week(day = :monday)
days_into_week = { :monday => 0, :tuesday => 1, :wednesday => 2, :thursday => 3, :friday => 4, :saturday => 5, :sunday => 6}
result = (self + 7).beginning_of_week + days_into_week[day]
self.acts_like?(:time) ? result.change(:hour => 0) : result
end
next_year()
click to toggle source
Shorthand for years_since(1)
def next_year
years_since(1)
end
past?()
click to toggle source
Returns true if the Date object’s date lies in the
past. Otherwise returns false.
def past?
self < ::Date.current
end
prev_month()
click to toggle source
Shorthand for months_ago(1)
def prev_month
months_ago(1)
end
prev_year()
click to toggle source
Shorthand for years_ago(1)
def prev_year
years_ago(1)
end
readable_inspect()
click to toggle source
Overrides the default inspect method with a human readable one, e.g., “Mon,
21 Feb 2005”
def readable_inspect
strftime("%a, %d %b %Y")
end
since(seconds)
click to toggle source
Converts Date to a Time (or
DateTime if necessary) with the time portion
set to the beginning of the day (0:00) and then adds the specified number
of seconds
def since(seconds)
to_time_in_current_zone.since(seconds)
end
sunday()
click to toggle source
to_date()
click to toggle source
A method to keep Time, Date
and DateTime instances interchangeable on
conversions. In this case, it simply returns self.
to_datetime()
click to toggle source
Converts a Date instance to a DateTime, where the time is set to the beginning
of the day and UTC offset is set to 0.
Examples
date = Date.new(2007, 11, 10) # => Sat, 10 Nov 2007
date.to_datetime # => Sat, 10 Nov 2007 00:00:00 0000
def to_datetime
::DateTime.civil(year, month, day, 0, 0, 0, 0)
end
to_default_s(format = :default)
click to toggle source
to_s(format = :default)
click to toggle source
to_time(form = :local)
click to toggle source
Converts a Date instance to a Time, where the time is set to the beginning of the
day. The timezone can be either :local or :utc (default :local).
Examples
date = Date.new(2007, 11, 10) # => Sat, 10 Nov 2007
date.to_time # => Sat Nov 10 00:00:00 0800 2007
date.to_time(:local) # => Sat Nov 10 00:00:00 0800 2007
date.to_time(:utc) # => Sat Nov 10 00:00:00 UTC 2007
def to_time(form = :local)
::Time.send("#{form}_time", year, month, day)
end
to_time_in_current_zone()
click to toggle source
Converts Date to a TimeWithZone in the current zone
if Time.zone_default is
set, otherwise converts Date to a Time via Date#to_time
def to_time_in_current_zone
if ::Time.zone_default
::Time.zone.local(year, month, day)
else
to_time
end
end
today?()
click to toggle source
Returns true if the Date object’s date is today.
def today?
self.to_date == ::Date.current
end
tomorrow()
click to toggle source
Convenience method which returns a new Date/DateTime representing the time
1 day since the instance time
def tomorrow
self + 1
end
xmlschema()
click to toggle source
def xmlschema
to_time_in_current_zone.xmlschema
end
years_ago(years)
click to toggle source
Returns a new Date/DateTime representing the time a number of specified
years ago.
def years_ago(years)
advance(:years => -years)
end
years_since(years)
click to toggle source
Returns a new Date/DateTime representing the time a number of specified
years in the future.
def years_since(years)
advance(:years => years)
end
yesterday()
click to toggle source
Convenience method which returns a new Date/DateTime representing the time
1 day ago
def yesterday
self - 1
end
![[+]](./images/find.png "show/hide quicksearch")