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Full Discussion: Help with sed substitution
Top Forums UNIX for Dummies Questions & Answers Help with sed substitution Post 302379758 by ghostdog74 on Saturday 12th of December 2009 03:25:24 AM
Old 12-12-2009
Quote:
Originally Posted by Scrutinizer
OK, but that is both hypothetical since the OP did not specify this, and not very typical anyway to have two fields with the same description.

And even if it were the case the sed solution would make this quite controllable.
Code:
$ line='Boston|tcolor=green|desc=Large city in New England|url=www.boston.com|tcolor=green'

$ echo "$line"| sed 's/\(tcolor=\)[^|]*/\1blue/'
Boston|tcolor=blue|desc=Large city in New England|url=www.boston.com|tcolor=green

$ echo "$line"| sed 's/\(tcolor=\)[^|]*/\1blue/2'
Boston|tcolor=green|desc=Large city in New England|url=www.boston.com|tcolor=blue

$ echo "$line"| sed 's/\(tcolor=\)[^|]*/\1blue/g'
Boston|tcolor=blue|desc=Large city in New England|url=www.boston.com|tcolor=blue

yes, its hypothetical, but anything is possible. And then comes the part i am asking: non greediness
Code:
$ title="Boston|tcolor=green|desc=Large city in New England|url=www.boston.com|tcolor=green|setcolor=green"
$ echo $title|sed 's/\(tcolor=\)[^|]*/\1blue/g'
Boston|tcolor=blue|desc=Large city in New England|url=www.boston.com|tcolor=blue|setcolor=blue

take care of that, and it should be perfect sed solution

---------- Post updated at 03:25 AM ---------- Previous update was at 03:16 AM ----------
Quote:
Originally Posted by Scrutinizer
I disagree with such a black and white rule. It depends.
you don't have to agree with me. I just don't waste my time crafting complex regex that is hard to read and debug when I can do things more easily.
 

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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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