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awk parse result that match data from file

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# 15  
Old 08-30-2015
Hi, x is an empty variable, since it was not used before. In awk it automatically gets the value "" (in string context) when it is created. So it is another way of writing "" (the replacement part of the sub() command has a string context)

The variable name is chosen, because it is a bit akin to "x'ing out" a bit of text.
Last edited by Scrutinizer; 08-30-2015 at 03:42 PM..
This User Gave Thanks to Scrutinizer For This Post:
Kibou
# 16  
Old 08-30-2015
x is a variable that never gets a value assigned to it. sub(".*/",x,$1) in the field $1 substitute the first instance of ".*/" for "".
This User Gave Thanks to Aia For This Post:
Kibou
# 17  
Old 08-30-2015
sorry to ask again, the s=s and the $1 all alone there? Never seen OFS on its own, always something like OFS="whatever"
# 18  
Old 08-30-2015
Actually, they are not alone, it is the concatenation of all of them as in:
Code:
s=s $1 OFS

OFS stands for Output Field Separator and by default is a single space
Last edited by Aia; 08-30-2015 at 04:18 PM.. Reason: grammar
This User Gave Thanks to Aia For This Post:
Kibou
# 19  
Old 08-30-2015
Quote:
Originally Posted by Kibou
sorry to ask again, the s=s and the $1 all alone there? Never seen OFS on its own, always something like OFS="whatever"
Hi Kibou, in addition to what Aia said, the string s is empty when created, and then each time it is appended with the first field ($1) and OFS (by default a space), so the first time, s contains:
4
, the second time
4 36
then
4 36 33
.. and so on...
This User Gave Thanks to Scrutinizer For This Post:
Kibou
# 20  
Old 08-30-2015
Thank you! I understand it now.
Thanks for your time and effort, to both of you.
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