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Full Discussion: Replace string in a file with some content indexed from another file.
Top Forums Shell Programming and Scripting Replace string in a file with some content indexed from another file. Post 302906622 by AlokKumbhare on Saturday 21st of June 2014 05:04:46 PM
Old 06-21-2014
Replace string in a file with some content indexed from another file.
We have two files

file 1: (usually small, ~100 lines), each line contains a : separated index, value e.g

Code:
2: Apple
1: Banana
5: Pear
7: Orange

File 2: (usually large, 10 million lines or more), each line contains a single string value. e.g
Code:
xyz1
xyz2
xyz3
xyz4
xyz5
xyz6
xyz7

Now the goal is to replace the "index" in the first file (in place) with the value from the second file. i.e. the index in the first file is the line number to be used to get the value from the second file.

e.g the contents for file 1 should be
Code:
xyz2:Apple
xyz1: Banana
xyz5: Pear
xyz7: Orange

Last edited by Don Cragun; 06-21-2014 at 06:22 PM.. Reason: Add CODE tags.
 

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LEARN ABOUT XFREE86

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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