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Full Discussion: Help needed in formatting the output
Top Forums Shell Programming and Scripting Help needed in formatting the output Post 302915037 by Don Cragun on Saturday 30th of August 2014 09:13:50 PM
Old 08-30-2014
Is this minor modification of the script supplied for your last thread sufficient?:
Code:
awk '
NF == 0 { next }
/^TT/ {	if(!((key = $1 FS $2) in out))
		out[key] = $0
	TTf = 1
	next
}
TTf {	out[key] = out[key] "\n" $0
	TTf = 0
	next
}
{	print $0 "\n"
}
END {	for(key in out)
		printf("%s\n\n", out[key])
}' data.txt

which produces the output:
Code:
<tell://me/500>

TT: <tell://me/sudheer>  
<tell://me/300>  
<tell://me/400>

TT: <tell://me/sreenivas> 
 <tell://me/100>
<tell://me/200>

for the input you provided in this thread. It makes the assumption that a line starting with TT: will not be followed by a blank line. If that is a problem for you, please try modifying the script to remove that assumption and let us know how it works for you.

If preserving the order of the 1st occurrence of the TT: line values is important, that can be fixed too. But, since the TT: input line for a given value aren't adjacent in your input file, I assume the order is not important i your output file.
This User Gave Thanks to Don Cragun For This Post:
raosr020
 

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LEARN ABOUT DEBIAN

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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