红宝石 |日期时间 to_datetime()函数

DateTime#to_datetime() : to_datetime()是一个 DateTime 类方法，它返回自身的 DateTime 对象。

Syntax: DateTime.to_datetime()

Parameter: DateTime values

Return: the self DateTime object.

示例 #1：

# Ruby code for DateTime.to_datetime() 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))
  
  
#  to_datetime method
puts "DateTime to_datetime form : #{date_a.to_datetime}\n\n"
  
puts "DateTime to_datetime form : #{date_b.to_datetime}\n\n"
  
puts "DateTime to_datetime form : #{date_c.to_datetime}\n\n"

输出 ：

DateTime to_datetime form : 2019-08-10T04:10:09+00:00

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

DateTime to_datetime form : 2019-08-10T04:10:09+04:00

示例 #2：

# Ruby code for DateTime.to_datetime() 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')
  
  
#  to_datetime method
puts "DateTime to_datetime form : #{date_a.to_datetime}\n\n"
  
puts "DateTime to_datetime form : #{date_b.to_datetime}\n\n"
  
puts "DateTime to_datetime form : #{date_c.to_datetime}\n\n"

输出 ：

DateTime to_datetime form : 2019-08-10T05:00:00+00:00

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

DateTime to_datetime form : 2019-08-10T04:10:09+03:00