我有以下节日阵列:
id = 1, Start_date = 2011-11-01 , End_date = 2016-12-31
[[1, 2011-11-01 , 2016-12-31],
[2, 2011-11-28 , 2016-12-31],
[3, 2011-10-01 , 2015-12-31],
[4, 2011-11-28 , 2021-12-31],
[5, 2010-11-15 , 2016-12-31],
[6, 2011-07-01 , 2017-12-31],
[7, 2012-02-01 , 2013-02-19],
[8, 2011-03-21 , 2015-04-30],
[9, 2012-03-01 , 2016-03-20]]
我需要按start_date
从当前日期开始排序,但忽略年份(仅使用月和日)。
实际上这些是节日的开始日期和结束日期。我需要首先显示正在运行的节日(按顺序:start_date)然后显示即将到来的节日(按顺序分别为:start_date)。
例如:
festival A: start_date: 15-may - end_date: 15-june
festival B: start_date: 01-june - end_date: 20-june
festival C: start_date: 01-oct - end_date: 30-oct
A B C
B C A
A B C
提前感谢您的回复。
答案 0 :(得分:3)
假设start_date
和end_date
是Date
个对象:
# get the festivals from the database
festivals = Festival.all
# define the day of interest
day = Date.today
# partition the festivals into running and upcoming
# based on the day of the year (1-366)
running, upcoming = festivals.partition { |f|
(f.start_date.yday..f.end_date.yday).include? day.yday
}
# sort each array by day of the year
running.sort_by!{ |f| f.start_date.yday }
upcoming.sort_by!{ |f| f.start_date.yday }