Date#-() 是一個 Date 類方法,如果對象是日期類型對象,則返回兩個日期之間的差異。
用法:Date.-()
參數:日期值
Return: 兩個日期之間的差異
示例#1:
# Ruby code for Date.-() 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"
# - form
puts "Date a - form : #{a - Rational(3, 2)}\n\n"
puts "Date b - form : #{b - Rational(10, 2)}\n\n"
puts "Date c - form : #{c - Rational(10, 4)}\n\n"
輸出:
Date a : 2019-01-01 Date b : 2001-04-04 Date c : 2019-01-12 Date a - form : 2018-12-30 Date b - form : 2001-03-30 Date c - form : 2019-01-09
示例#2:
# Ruby code for Date.-() 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"
# - form
puts "Date a - form : #{a - Rational(3, 2)}\n\n"
puts "Date b - form : #{b - Rational(10, 2)}\n\n"
puts "Date c - form : #{c - Rational(10, 4)}\n\n"
輸出:
Date a : 2019-01-01 Date b : 2019-12-03 Date c : 2019-02-02 Date a - form : 2018-12-30 Date b - form : 2019-11-28 Date c - form : 2019-01-30
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注:本文由純淨天空篩選整理自Kirti_Mangal大神的英文原創作品 Ruby | Date – function。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。