Ruby | Date ajd() method
Last Updated :
09 Jan, 2020
Date#ajd() is a Date class method which returns the astronomical Julian day number.
Syntax: Date.ajd()
Parameter: Date values
Return: the astronomical Julian day number.
Example #1 :
require 'date'
a = Date. new ( 2019 , 1 , 1 )
b = Date.jd( 2452004 )
c = Date.ordinal( 2019 , 12 )
puts "Date a : #{a}\n\n"
puts "Date b : #{b}\n\n"
puts "Date c : #{c}\n\n\n\n"
puts "Date a ajd form : #{a.ajd}\n\n"
puts "Date b ajd form : #{b.ajd}\n\n"
puts "Date c ajd form : #{c.ajd}\n\n"
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Output :
Date a : 2019-01-01
Date b : 2001-04-04
Date c : 2019-01-12
Date a ajd form : 4916969/2
Date b ajd form : 4904007/2
Date c ajd form : 4916991/2
Example #2 :
require 'date'
a = Date.parse( '2019-01-01' )
b = Date.strptime( '03-12-2019' , '%d-%m-%Y' )
c = Date.commercial( 2019 , 5 , 6 )
puts "Date a : #{a}\n\n"
puts "Date b : #{b}\n\n"
puts "Date c : #{c}\n\n\n\n"
puts "Date a ajd form : #{a.ajd}\n\n"
puts "Date b ajd form : #{b.ajd}\n\n"
puts "Date c ajd form : #{c.ajd}\n\n"
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Output :
Date a : 2019-01-01
Date b : 2019-12-03
Date c : 2019-02-02
Date a ajd form : 4916969/2
Date b ajd form : 4917641/2
Date c ajd form : 4917033/2
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