Ruby DateTime strftime()用法及代码示例

DateTime＃strftime()：strftime()是DateTime类方法，该方法将Formats date返回给定格式字符串中的指令。

用法：DateTime.strftime()

参数：日期时间值

返回：按照给定格式字符串中的指令进行操作。

示例1:

# Ruby code for DateTime.strftime() method 
  
# loading library 
require 'date'
  
# declaring DateTime value 
date_a = DateTime.new(2019, 8, 10, 4, 10, 9) 
  
# declaring DateTime value 
date_b = DateTime.new(2019, 8, 10.5) 
  
# declaring DateTime value 
date_c = DateTime.new(2019, 8, 10, 4, 10, 9, Rational(4, 24)) 
  
  
#  strftime method 
puts "DateTime strftime form : #{date_a.strftime("Printed on %m/%d/%Y")}\n\n"
  
puts "DateTime strftime form : #{date_b.strftime}\n\n"
  
puts "DateTime strftime form : #{date_c.strftime("at %I:%M%p")}\n\n"

输出：

DateTime strftime form : Printed on 08/10/2019

DateTime strftime form : 2019-08-10T12:00:00+00:00

DateTime strftime form : at 04:10AM

示例2:

# Ruby code for DateTime.strftime() method 
  
# loading library 
require 'date'
  
# declaring DateTime value 
date_a = DateTime.new(2019, 8, 10, 5) 
  
# declaring DateTime value 
date_b = DateTime.parse('10 Aug 2018 04:10:06+04:30') 
  
# declaring DateTime value 
date_c = DateTime.new(2019, 8, 10, 4, 10, 9, '+03:00') 
  
  
#  strftime method 
puts "DateTime strftime form : #{date_a.strftime("Printed on %m/%d/%Y")}\n\n"
  
puts "DateTime strftime form : #{date_b.strftime}\n\n"
  
puts "DateTime strftime form : #{date_c.strftime("at %I:%M%p")}\n\n"

输出：

DateTime strftime form : Printed on 08/10/2019

DateTime strftime form : 2018-08-10T04:10:06+04:30

DateTime strftime form : at 04:10AM

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注：本文由纯净天空筛选整理自mayank5326大神的英文原创作品 Ruby | DateTime strftime() function。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。