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| # encoding: utf-8
# .rvmrc rvm use 2.5.1
require 'date'
require '/data/ruby/debug/debug.rb'
def cheack_date_true(year, month, day)
not leap_year(year) and month == 2 and day == 29
end
def leap_year_days(y)
leap_year(y) ? 366 : 365
end
def leap_year(y)
y % 4 == 0 && y % 100 != 0 || y % 400 == 0
end
def md(y)
if leap_year(y)
[0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
else
[0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
end
end
def days(date)
year, month, day = date.split("/").map(&:to_i)
return false if cheack_date_true(year, month, day)
y = year - 1
years = y * 365 + (y / 4 - y / 100 + y / 400)
months = md(year)[1..(month - 1)].sum
years + months + day
end
def add_date(date, num)
return Date.parse(date) if num == 0
year, month, day = date.split("/").map(&:to_i)
return false if cheack_date_true(year, month, day)
left_year = md(year)[month..13].sum - day
if num > left_year
month = day = 0
num -= left_year
until num < leap_year_days(year + 1)
num -= leap_year_days(year + 1)
year += 1
end
year += 1
elsif num == left_year
return "#{year}/12/31"
end
num += day
md(year).each_with_index do |d, idx|
next if idx < month
if num <= d
return "#{year}/#{idx}/#{num}"
else
num -= d
end
end
end
def between(sdate, edate)
s = days(sdate)
e = days(edate)
s and e ? (days(edate) - days(sdate)).abs : false
end
#i = Time.now.to_i
#t = Time.at(i)
adate = '1950/1/1'
bdate = '1981/2/29'
cdate = '2000/2/29'
p days(adate)
p days(bdate)
p between(adate, bdate)
p between(adate, cdate)
p add_date(cdate, 1000)
|