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Top Forums Shell Programming and Scripting Replace/Remove not specific text in perl Post 302507236 by chriss_58 on Wednesday 23rd of March 2011 09:00:34 AM
Old 03-23-2011
Replace/Remove not specific text in perl

Hello,

Consider that i have many files that have the below format:

file1
Code:
900    7777
1000   5   6   23     nnnnnnnnnnnnnnnnnn
1100 kkkkkkk

file2
Code:
900    1989
1000   5   3   10  kkkdfdfdffd
1100 kkkkkkk


What i would like to do is on every file to search the line that starts with '1000' and remove everything that exist after the 3rd token e.g for file1 remove everything that exists after '23', and for file2 remove everything that exist after '10'

I know how to search for the line that starts with '1000' but i do not know how to remove the string that exist after the third token.

Best Regards,
Christos
Moderator's Comments:
Mod Comment
Please use code tags when posting data and code samples!

Last edited by vgersh99; 03-23-2011 at 10:08 AM.. Reason: code tags, please!
 

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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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