класс Time

# File activesupport/lib/active_support/core_ext/time/acts_like.rb, line 5
def acts_like_time?
  true
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 131
def advance(options)
  unless options[:weeks].nil?
    options[:weeks], partial_weeks = options[:weeks].divmod(1)
    options[:days] = options.fetch(:days, 0) + 7 * partial_weeks
  end

  unless options[:days].nil?
    options[:days], partial_days = options[:days].divmod(1)
    options[:hours] = options.fetch(:hours, 0) + 24 * partial_days
  end

  d = to_date.advance(options)
  d = d.gregorian if d.julian?
  time_advanced_by_date = change(:year => d.year, :month => d.month, :day => d.day)
  seconds_to_advance =        options.fetch(:seconds, 0) +
    options.fetch(:minutes, 0) * 60 +
    options.fetch(:hours, 0) * 3600

  if seconds_to_advance.zero?
    time_advanced_by_date
  else
    time_advanced_by_date.since(seconds_to_advance)
  end
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 158
def ago(seconds)
  since(-seconds)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 231
def all_day
  beginning_of_day..end_of_day
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 171
def beginning_of_day
  change(:hour => 0)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 200
def beginning_of_hour
  change(:min => 0)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 216
def beginning_of_minute
  change(:sec => 0)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 95
def change(options)
  new_year  = options.fetch(:year, year)
  new_month = options.fetch(:month, month)
  new_day   = options.fetch(:day, day)
  new_hour  = options.fetch(:hour, hour)
  new_min   = options.fetch(:min, options[:hour] ? 0 : min)
  new_sec   = options.fetch(:sec, (options[:hour] || options[:min]) ? 0 : sec)

  if new_nsec = options[:nsec]
    raise ArgumentError, "Can't change both :nsec and :usec at the same time: #{options.inspect}" if options[:usec]
    new_usec = Rational(new_nsec, 1000)
  else
    new_usec  = options.fetch(:usec, (options[:hour] || options[:min] || options[:sec]) ? 0 : Rational(nsec, 1000))
  end

  if utc?
    ::Time.utc(new_year, new_month, new_day, new_hour, new_min, new_sec, new_usec)
  elsif zone
    ::Time.local(new_year, new_month, new_day, new_hour, new_min, new_sec, new_usec)
  else
    raise ArgumentError, 'argument out of range' if new_usec >= 1000000
    ::Time.new(new_year, new_month, new_day, new_hour, new_min, new_sec + (new_usec.to_r / 1000000), utc_offset)
  end
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 267
def compare_with_coercion(other)
  # we're avoiding Time#to_datetime and Time#to_time because they're expensive
  if other.class == Time
    compare_without_coercion(other)
  elsif other.is_a?(Time)
    compare_without_coercion(other.to_time)
  else
    to_datetime <=> other
  end
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 189
def end_of_day
  change(
    :hour => 23,
    :min => 59,
    :sec => 59,
    :usec => Rational(999999999, 1000)
  )
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 206
def end_of_hour
  change(
    :min => 59,
    :sec => 59,
    :usec => Rational(999999999, 1000)
  )
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 222
def end_of_minute
  change(
    :sec => 59,
    :usec => Rational(999999999, 1000)
  )
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 282
def eql_with_coercion(other)
  # if other is an ActiveSupport::TimeWithZone, coerce a Time instance from it so we can do eql? comparison
  other = other.comparable_time if other.respond_to?(:comparable_time)
  eql_without_coercion(other)
end

# File activesupport/lib/active_support/core_ext/time/conversions.rb, line 64
def formatted_offset(colon = true, alternate_utc_string = nil)
  utc? && alternate_utc_string || ActiveSupport::TimeZone.seconds_to_utc_offset(utc_offset, colon)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 179
def middle_of_day
  change(:hour => 12)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 258
def minus_with_coercion(other)
  other = other.comparable_time if other.respond_to?(:comparable_time)
  other.is_a?(DateTime) ? to_f - other.to_f : minus_without_coercion(other)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 79
def sec_fraction
  subsec
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 63
def seconds_since_midnight
  to_i - change(:hour => 0).to_i + (usec / 1.0e+6)
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 72
def seconds_until_end_of_day
  end_of_day.to_i - to_i
end

# File activesupport/lib/active_support/core_ext/time/calculations.rb, line 163
def since(seconds)
  self + seconds
rescue
  to_datetime.since(seconds)
end

# File activesupport/lib/active_support/core_ext/time/conversions.rb, line 49
def to_formatted_s(format = :default)
  if formatter = DATE_FORMATS[format]
    formatter.respond_to?(:call) ? formatter.call(self).to_s : strftime(formatter)
  else
    to_default_s
  end
end

# File activesupport/lib/active_support/core_ext/time/compatibility.rb, line 11
def to_time
  preserve_timezone ? self : getlocal
end