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Full Discussion: OR operator syntax question in AWK script
Top Forums Shell Programming and Scripting OR operator syntax question in AWK script Post 302416063 by cgkmal on Saturday 24th of April 2010 05:11:17 PM
Old 04-24-2010
Hey penchal,

Many thanks, the magic character "\" was missing for me, great to know now.

One more question regarding this:

Independently and without use what I have in other columns, how can
I replace a field value in specific line using AWK?

Inputfile (In 3rd column all lines contain the same pattern)
Code:
January|Month No. 1|Normal month
February|Month No. 2|Normal month
March|Month No. 3|Normal month
April|Month No. 4|Normal month
May|Month No. 5|Normal month
June|Month No. 6|Normal month
July|Month No. 7|Normal month
August|Month No. 8|Normal month
September|Month No. 9|Normal month
October|Month No. 10|Normal month
November|Month No. 11|Normal month
December|Month No. 12|Normal month

I would like to replace only the first and last line in column 3 as follow:
Code:
January|Month No. 1|First month
February|Month No. 2|Normal month
March|Month No. 3|Normal month
April|Month No. 4|Normal month
May|Month No. 5|Normal month
June|Month No. 6|Normal month
July|Month No. 7|Normal month
August|Month No. 8|Normal month
September|Month No. 9|Normal month
October|Month No. 10|Normal month
November|Month No. 11|Normal month
December|Month No. 12|Last month

I´m not sure how to use the "if" and "and" conditions together. I´m trying for the first part with this code, but the result is not what I need, because this script replaces all ocurrences:
Code:
awk 'BEGIN {OFS=FS="|"; IGNORECASE=1} {if($3 && NR=1) sub(/Normal month/,"First month",$3); print}' inputfile

January|Month No. 1|First month
February|Month No. 2|First month
March|Month No. 3|First month
April|Month No. 4|First month
May|Month No. 5|First month
June|Month No. 6|First month
July|Month No. 7|First month
August|Month No. 8|First month
September|Month No. 9|First month
October|Month No. 10|First month
November|Month No. 11|First month
December|Month No. 12|First month

Then, how can I replace values for first and last lines within same AWK script?

Maybe somebody could help me with this.

Thanks in advance.
 

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LEARN ABOUT DEBIAN

fixnt

fixnt(1)							      Debian								  fixnt(1)

NAME

       fixnt - Filter for the Windows NT postscript printer driver.

SYNOPSIS

       fixnt < BADFILE.ps > GOODFILE.ps

DESCRIPTION

       The  Windows  NT  postscript  driver has a tendency to make broken postscript files, that are incompatible with psutils.  fixnt is a filter
       that fixes these problems, allowing the use of psnup(1).

       The filter takes the broken postscript file on stdin, and outputs a fixed postscript file on stdout.  It has no other form  for	invocation
       and takes no options on the command-line.

OPTIONS

       fixnt  takes no options.

BUGS

       fixnt does not check for NTPSOct94.  For a workaround, use a sed(1) command to replace 'NTPSOct94' with 'NTPSOct95', like so:
	      sed 's/NTPSOct94/NTPSOct95/g'
       This is particularly important for Windows NT 3.5 users.

AUTHOR

       fixnt   was   written   by   Holger   Bauer   <Holger.Bauer@topmail.de>,  Michael  Rath	<rath@itsm.uni-stuttgart.de>,  and  Akim  Demaille
       <demaille@inf.enst.fr>.

REPORTING BUGS

       Report bugs to the Authors, but avoid sending large postscript files.

       Patches are always welcome; send to <bauer@itsm.uni-stuttgart.de>.

SEE ALSO

       psnup(1), sed(1)

a2ps								   February 2003							  fixnt(1)
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