从单个日期获取日期范围

Question

我当然可以自己做,但是Ruby或库中有内置功能,可以让我这样做

date = Time.now
sunday = date.week.first_day
saturday = date.week.last_day

谢谢

Answer 1

使用ActiveSupport gem.然而,它认为周一是本周的开始.

require 'active_support'
d = Date.today                     # => Mon, 25 Jan 2010
sun = d.beginning_of_week - 1.day  # => Sun, 24 Jan 2010
sat = d.end_of_week - 1.day        # => Sat, 30 Jan 2010

如果今天是星期天,需要更多的工作

def week_ends(date)
  sun = date.beginning_of_week - 1.day
  sat = date.end_of_week - 1.day
  if date.sunday?
    sun += 1.week
    sat += 1.week
  end
  [sun, sat]
end

p d = Date.today
p week_ends(d)

p d = Date.yesterday
p week_ends(d)

结果是

Mon, 25 Jan 2010
[Sun, 24 Jan 2010, Sat, 30 Jan 2010]
Sun, 24 Jan 2010
[Sun, 24 Jan 2010, Sat, 30 Jan 2010]