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Full Discussion: cut awk dummy question :)
Top Forums UNIX for Dummies Questions & Answers cut awk dummy question :) Post 302144822 by Lakris on Saturday 10th of November 2007 07:13:19 AM
Old 11-10-2007
Quote:
Originally Posted by sopel39
input is a file which can contain " symbols
and cut or awk should interpete line like this...
WOW!
This one almost had my brains boiling but I was set on solving it in bash...
There were problems with read and quotes, if I enter for example on the commandline
Quote:
temp=(qwer "sdfg sdfg" asdf)
it evaluates to three elements but in read or when assigning the read variable to something else, it evaluates to four elements, the quotes are treated as parts of the words they are next to. So I came up with eval, what a nice feature! I use === as separator just to show it more clearly.


Quote:
lakris@ubuntu:~/projekt/scripts$ cat textfile.txt
Male "adam jones" angling
"Not confirmed" "paul higgins" "clothes and music"
Female "kelly lowe" shoes
lakris@ubuntu:~/projekt/scripts$ cat quoted-text.sh
#!/bin/bash
while read line; do
command="slask=($line)"
eval $command
for (( i=0 ; i<${#slask[*]} ; i++ )) ; do
echo -n ${slask[i]} === ;
done
echo
done <textfile.txt
lakris@ubuntu:~/projekt/scripts$ chmod +x quoted-text.sh
lakris@ubuntu:~/projekt/scripts$ ./quoted-text.sh
Male ===adam jones ===angling ===
Not confirmed ===paul higgins ===clothes and music ===
Female ===kelly lowe ===shoes ===
lakris@ubuntu:~/projekt/scripts$
/Lakris
 

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LEARN ABOUT DEBIAN

ppmtopgm

ppmtopgm(1)						      General Commands Manual						       ppmtopgm(1)

NAME

       ppmtopgm - convert a portable pixmap into a portable graymap

SYNOPSIS

       ppmtopgm [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as  input.  Produces a portable graymap as output.  The output is a "black and white" rendering of the original
       image, as in a black and white photograph.  The quantization formula used is .299 r + .587 g + .114 b.

       Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any  ppm  program  can
       read  pgm  (and	pbm  ) files automatically.  pgmtoppm is for colorizing a pgm file.  Also, see ppmtorgb3 for a different way of converting
       color to gray.  And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate  the  original
       colors, not necessarily a way that looks like a black and white photograph.

QUOTE

       Cold-hearted orb that rules the night
       Removes the colors from our sight
       Red is gray, and yellow white
       But we decide which is right
       And which is a quantization error.

SEE ALSO

       pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

								   10 April 2000						       ppmtopgm(1)
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