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Full Discussion: sed with pattern using variable
Top Forums Shell Programming and Scripting sed with pattern using variable Post 303011154 by mystition on Sunday 14th of January 2018 06:47:03 AM
Old 01-14-2018
Quote:
Originally Posted by MadeInGermany
Also doable with sed, continuing on your attempt
Code:
sed -e '/<OfferDefinition Id="/ {h; s/.*=" *//; s/ *">.*//; x; n;}' -e '/<Description>/ {H; x; s/\(.*\)\n\(.*<Description>\)/\2\1_/;}' file.txt

Better readable in two lines
Code:
sed '
  /<OfferDefinition Id="/ {h; s/.*=" *//; s/" *>.*//; x; n;}
  /<Description>/ {H; x; s/\(.*\)\n\(.*<Description>\)/\2\1_/;}
' file.txt

Of course digging out the saved value from the hold space is a bit of a hack (also in the previous post).
While the other codes using awk were giving slight errors (while printing the 'id' in 'description', they were replacing the existing text) which could be tweaked, your code worked perfectly. Many Thanks!

---------- Post updated at 05:17 PM ---------- Previous update was at 05:03 PM ----------

Quote:
Originally Posted by RudiC
Try also
Code:
awk -F\" '/OfferDefinition>/ {ID = $2} /Description>/ {sub (/>/, "&" ID "_")} 1' file

Thanks Rudi, you are always helpful. Worked with a little bit of tweak in separators:

Code:
 awk -F\" '/OfferDefinition>|="/ {ID = $2"_"} /Description>/ {sub (/>/, "&" ID )} 1' file

However, can you explain why you have used '1' at the end? I tried removing it to understand but the code doesn't work without it...

BR//
 

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LEARN ABOUT V7

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)
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