Ruby Date cwyear()函数

Date#cwyear()是一个Date类方法，用于返回基于日历周的年份。

语法。Date.cwyear()

参数。日期值

返回：基于日历周的年份。

例子 #1 :

# Ruby code for Date.cwyear() method
   
# loading date
require 'date'
   
# declaring Date 
a = Date.new(2019, 1, 1)
   
# declaring Date
b = Date.jd(2452004)
   
# declaring Date
c = Date.ordinal(2019, 12)
   
# Date 
puts "Date a : #{a}\n\n"
puts "Date b : #{b}\n\n"
puts "Date c : #{c}\n\n\n\n"
   
   
# cwyear form 
puts "Date a cwyear form : #{a.cwyear}\n\n"
puts "Date b cwyear form : #{b.cwyear}\n\n"
puts "Date c cwyear form : #{c.cwyear}\n\n"

输出:

Date a : 2019-01-01

Date b : 2001-04-04

Date c : 2019-01-12



Date a cwyear form : 2019

Date b cwyear form : 2001

Date c cwyear form : 2019

例子 #2 :

# Ruby code for Date.cwyear() method
  
# loading date
require 'date'
  
# declaring Date 
a = Date.parse('2019-01-01')
  
# declaring Date
b = Date.strptime('03-12-2019', '%d-%m-%Y')
  
# declaring Date
c = Date.commercial(2019, 5, 6)
  
# Date 
puts "Date a : #{a}\n\n"
puts "Date b : #{b}\n\n"
puts "Date c : #{c}\n\n\n\n"
  
  
# cwyear form 
puts "Date a cwyear form : #{a.cwyear}\n\n"
puts "Date b cwyear form : #{b.cwyear}\n\n"
puts "Date c cwyear form : #{c.cwyear}\n\n"

输出:

Date a : 2019-01-01

Date b : 2019-12-03

Date c : 2019-02-02



Date a cwyear form : 2019

Date b cwyear form : 2019

Date c cwyear form : 2019