Ruby 周数结果
Ruby week number results
为什么我用
Time.now.strftime('%Y%W')
或
Date.today.strftime('%Y%W')
他们 return 201912 而它应该是 201913 因为我们在第 13 周，而不是第 12 周。
如何获取当前周数？
Time.now.strftime('%Y%V')
会给你想要的输出。
%V - Week number of the week-based year (01..53)
你必须寻找基于周的年份。
如果您查看文档，它是这样说的：
Week number: The first week of YYYY that starts with a Sunday or
Monday (according to %U or %W). The days in the year before the first
week are in week 0.
%U - Week number of the year. The week starts with Sunday. (00..53)
%W - Week number of the year. The week starts with Monday. (00..53)
2019 年 1 月 1 日是星期二，所以那应该是第 0 周 - 今天是第 12 周。
为什么我用
Time.now.strftime('%Y%W')
或
Date.today.strftime('%Y%W')
他们 return 201912 而它应该是 201913 因为我们在第 13 周，而不是第 12 周。
如何获取当前周数？
Time.now.strftime('%Y%V')
会给你想要的输出。
%V - Week number of the week-based year (01..53)
你必须寻找基于周的年份。
如果您查看文档，它是这样说的：
Week number: The first week of YYYY that starts with a Sunday or
Monday (according to %U or %W). The days in the year before the first
week are in week 0.
%U - Week number of the year. The week starts with Sunday. (00..53)
%W - Week number of the year. The week starts with Monday. (00..53)
2019 年 1 月 1 日是星期二，所以那应该是第 0 周 - 今天是第 12 周。