Question

如何根据当前星期红宝石（星期一至星期日）的日期获取上周的开始日期和结束日期

示例：如果日期为04-feb-15，则结果应为start_date = Monday（26-jan-1015）end_date = Sunday（1-feb-15）

如果日期是27-feb-15，那么结果应该是start_date = Monday（16-feb-1015）end_date =（22-feb-15）

Answer 1

您可以尝试这种方式：

require 'date'
=> true

date = Date.today
=> #<Date: 2015-02-04 ((2457058j,0s,0n),+0s,2299161j)>

# date.wday return week day
end_date = date-date.wday
=> #<Date: 2015-02-01 ((2457055j,0s,0n),+0s,2299161j)>

start_date = date-date.wday-6
=> #<Date: 2015-01-26 ((2457049j,0s,0n),+0s,2299161j)>

有关更多操作，请参阅此链接Ruby Doc.

Answer 2

使用日期#wday告诉一周中的某一天是给定日期，然后相应地减去：

require 'date'

date = Date.parse("15-02-04")
monday = date - (date.wday + 6) # 2015-01-26
sunday = date - date.wday # 2015-02-01

date = Date.parse("15-02-27")
monday = date - (date.wday + 6) # 2015-02-16
sunday = date - date.wday # 2015-02-22

Answer 3

我已经尝试过以下代码，工作正常。

monday = (Date.today.beginning_of_week - 7) # 2015-01-26
sunday = (Date.today.end_of_week - 7) # 2015-02-01

Answer 4

您可以尝试这种方式

monday = (Date.today.beginning_of_week.last_week)

sunday = (Date.today.beginning_of_week.last_week + 7)

Answer 5

上周的第一天

 Date.today.last_week.beginning_of_week

上周的最后日期
```
 Date.today.last_week.at_end_of_week
```

如何根据当前星期红宝石中的日期获得上周的开始日期和结束日期

5 个答案: