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How to get first sunday of the month?

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Top Forums Shell Programming and Scripting How to get first sunday of the month?
# 8  
Old 05-08-2013
Quote:
Originally Posted by infyanurag
cal 1 2012
January 2012
S M Tu W Th F S
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31


cal 1 2012 | awk 'NF==7 && !/^Su/{print $1;exit}'

S

---------- Post updated at 10:00 PM ---------- Previous update was at 09:58 PM ----------

/usr/xpg4/bin/awk

this is also giving me S
As you can see, the output of "cal 1 2012" in your system is not the same as in that of clx.

He is using "Su" for "Sunday" - that's so he could avoid parsing the line that starts with "Su".

But you have "S" for "Sunday", so now you know the change you have to make in your script to make it work.
This User Gave Thanks to durden_tyler For This Post:
clx
# 9  
Old 05-08-2013
Code:
cal 5 2013 | awk 'NF==7&&NR>2{print $1;exit}'

This User Gave Thanks to Yoda For This Post:
infyanurag
# 10  
Old 05-08-2013
Thanks Yoda, it worked, can we also use it to get the second sunday?
I mean to get it generalized?
# 11  
Old 05-08-2013
Here is a generalized approach for sunday:
Code:
cal 5 2013 | /usr/xpg4/bin/awk -v n=2 'NR>2&&!/^  /{if(++c==n) {print $1;exit}}'

Change n variable value as per your requirement.
This User Gave Thanks to Yoda For This Post:
infyanurag
# 12  
Old 05-08-2013
Many Thanks to all, especially Yoda. Now I have learnt how to do this by your help
# 13  
Old 05-08-2013
The previous expressions suffer from the format; the first week has different number of fields depending on the month.
The following tries to correct that
Code:
cal 5 2013 |
 sed 's/\(..\) /\1|/g' |
 awk -F"|" '(NF==7 || $1~/[0-9]/) && $day~/[0-9]/ && ++c==count {print $day+0}' day=1 count=2

You can put various days and counts ...
# 14  
Old 05-08-2013
Quote:
Originally Posted by Yoda
Code:
cal 5 2013 | awk 'NF==7&&NR>2{print $1;exit}'

Same as I posted here:
https://www.unix.com/shell-programmin...day-march.html

How many threads are needed to solve one problem?
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