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Class: TZInfo::LastDayOfMonthTransitionRule Private

Do not use. This class is for internal use only.
Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, DayOfWeekTransitionRule, TransitionRule
Instance Chain:
self, DayOfWeekTransitionRule, TransitionRule
Inherits: TZInfo::DayOfWeekTransitionRule
Defined in: lib/tzinfo/transition_rule.rb

Overview

A rule that transitions on the last occurrence of a particular day of week of a calendar month.

Class Method Summary

DayOfWeekTransitionRule - Inherited

.new

Initializes a new DayOfWeekTransitionRule.

TransitionRule - Inherited

.new

Initializes a new TransitionRule.

Instance Attribute Summary

DayOfWeekTransitionRule - Inherited

#is_always_first_day_of_year?, #is_always_last_day_of_year?, #day_of_week, #month

TransitionRule - Inherited

#transition_at

Returns the number of seconds after midnight local time on the day identified by the rule at which the transition occurs.

Instance Method Summary

  • #==(r) ⇒ Boolean (also: #eql?) Internal use only

    Determines if this LastDayOfMonthTransitionRule is equal to another instance.

  • #eql?(r)

    Alias for #==.

  • #get_day(offset, year) ⇒ Time protected Internal use only

    Returns a Time representing midnight local time on the day specified by the rule for the given offset and year.

DayOfWeekTransitionRule - Inherited

#==

Determines if this DayOfWeekTransitionRule is equal to another instance.
#eql?

Alias for DayOfWeekTransitionRule#==.
#hash_args

TransitionRule - Inherited

#==

Determines if this TransitionRule is equal to another instance.
#at

Calculates the time of the transition from a given offset on a given year.
#eql?

Alias for TransitionRule#==.
#hash, #hash_args

Instance Method Details

#==(r) ⇒ Boolean Also known as: #eql?

Determines if this LastDayOfMonthTransitionRule is equal to another instance.

Parameters:

  • r (Object) —

    the instance to test for equality.

Returns:

  • (Boolean) —

    true if r is a LastDayOfMonthTransitionRule with the same transition_at, month and day of week as this LastDayOfMonthTransitionRule, otherwise false.

[ GitHub ] 

  


# File 'lib/tzinfo/transition_rule.rb', line 420



def ==(r)
  super(r) && r.kind_of?(LastDayOfMonthTransitionRule)
end


  








  

    #eql?(r)  
  



  

    
Alias for #==.


  



  [ GitHub ]


  

  


# File 'lib/tzinfo/transition_rule.rb', line 423



alias eql? ==


  








  

    #get_day(offset, year)  ⇒ Time  (protected)
  



  

    
Returns a Time representing midnight local time on the day specified by
the rule for the given offset and year.


  





  
Parameters:


    
  
  • 
    offset
    (TimezoneOffset)
—    
    the current offset at the time of the
transition.
    

    
  
    • 
  
  • 
    year
    (Integer)
—    
    the year in which the transition occurs.
    

    
  
    • 



Returns:


    
  
  • 
    (Time)
—    
    midnight local time on the day specified by the rule for
the given offset and year.
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/tzinfo/transition_rule.rb', line 435



def get_day(offset, year)
  next_month = month + 1
  if next_month == 13
    year += 1
    next_month = 1
  end

  candidate = Time.new(year, next_month, 1, 0, 0, 0, offset.observed_utc_offset) - 86400
  diff = candidate.wday - day_of_week

  if diff < 0
    candidate - (diff + 7) * 86400
  elsif diff > 0
    candidate - diff * 86400
  else
    candidate
  end
end