红宝石 |时间 isdst函数

Time#isdst()：isdst()是一个 Time 类方法，用于检查时间是否出现在其时区的夏令时。

Syntax: Time.isdst()
Parameter: Time values
Return: true – if the time occurs during Daylight Saving Time in its time zone otherwise return false

示例 #1：

Ruby

# Ruby code for Time.isdst() method
 
# declaring time
a = Time.new(2019)
 
# declaring time
b = Time.new(2019, 10)
 
# declaring time
c = Time.new(2019, 12, 31)
 
# Time
puts "Time a : #{a}\n\n"
puts "Time b : #{b}\n\n"
puts "Time c : #{c}\n\n\n\n"
 
 
# isdst form
puts "Time a isdst form : #{a.isdst}\n\n"
puts "Time b isdst form : #{b.isdst}\n\n"
puts "Time c isdst form : #{c.isdst}\n\n"

输出 ：

Time a : 2019-01-01 00:00:00 +0100

Time b : 2019-10-01 00:00:00 +0200

Time c : 2019-12-31 00:00:00 +0100



Time a isdst form : false

Time b isdst form : true

Time c isdst form : false

示例 #2：

红宝石

# Ruby code for Time.isdst() method
 
# declaring time
a = Time.now
 
# declaring time
b = Time.new(1000, 10, 10)
 
# declaring time
c = Time.new(2020, 12)
 
# Time
puts "Time a : #{a}\n\n"
puts "Time b : #{b}\n\n"
puts "Time c : #{c}\n\n\n\n"
 
 
# isdst form
puts "Time a isdst form : #{a.isdst}\n\n"
puts "Time b isdst form : #{b.isdst}\n\n"
puts "Time c isdst form : #{c.isdst}\n\n"

输出 ：

Time a : 2019-08-27 03:48:18 +0200

Time b : 1000-10-10 00:00:00 +0053

Time c : 2020-12-01 00:00:00 +0100



Time a isdst form : true

Time b isdst form : false

Time c isdst form : false