知道日期/星期，不知道年份，求助

volwang

时间求助：
已知一段文本：
Mon Aug   4  16:02:50   
Fri    Mar  22 17:14:41
Tue Oct   23 18:38:49   
。。。

不知道每列年份是多少，只知道这几个时间发生在[2012,2014]年之间，希望把年份添加到每类的后面
得到的结果是：
Mon Aug   4  16:02:50     2014
Fri    Mar  22 17:14:41     2013
Tue Oct   23 18:38:49      2012
。。。                             。。。

特求助。

volwang

可能出现的日期简写：
星期一： Mon
星期二： Tue
星期三：Wed
星期四：Thu
星期五：  Fri
星期六：  Sat
星期天： Sun

一  月：Jan
二  月：Feb
三  月：Mar
四  月：Apr
五  月：May
六  月：Jun
七  月：Jul
八  月：Aug
九  月：Sep
十  月：Oct
十一月：Nov
十二月：Dec

jason680

回复 1# volwang

1. to get weekday idea
  date -d " Aug 4 2012 16:02:50" +%a

2. awk implement
  cmd="shell command"
  cmd | getline w
  close(cmd)

$ awk -vs=" " '{for(n=2012;n<=2014;n++){cmd="date -d \""$2s$3s n s$4"\" +%a" ;cmd|getline w;close(cmd);if(w==$1){print $0"\t"n;next}}}' FILE
Mon Aug   4 16:02:50           2014
Fri Mar  22 17:14:41        2013
Tue Oct  23 18:38:49        2012

   

volwang

相同日期，星期  ，不同的年份，重复的概率有多大。要是把范围放大，代码是不是可能出错

yestreenstars

回复 3# jason680

这头像好牛X~
   

q1208c

回复 4# volwang
是的. 会有很大的重复率.

所以, 我真心觉得, 靠猜来解决问题不是办法. 你最好能找到更合适的办法.

   

Shell_HAT

The 400-year cycle of the Gregorian calendar has 146,097 days and hence exactly 20,871 weeks. So, for example, the days of the week in Gregorian 1603 were exactly the same as for 2003. The years that are divisible by 400 begin on a Saturday. In the 400-year cycle, more months begin on a Sunday (and hence have Friday the 13th) than any other day of the week (see above under Week for a more detailed explanation of how this happens). 688 out of every 4800 months (or 172/1200) begin on a Sunday, while only 684 out of every 4800 months (171/1200) begin on each of Saturday and Monday, the least common cases.

A smaller cycle is 28 years (1,461 weeks), provided that there is no dropped leap year in between. Days of the week in years may also repeat after 6, 11, 12, 28 or 40 years. Intervals of 6 and 11 are only possible with common years, while intervals of 28 and 40 are only possible with leap years. An interval of 12 years only occurs with common years when there is a dropped leap year in between.