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Full Discussion: Can BASH handle mathematical operations and do a Search & Replace?
Top Forums Shell Programming and Scripting Can BASH handle mathematical operations and do a Search & Replace? Post 302489947 by jl487 on Saturday 22nd of January 2011 10:02:16 PM
Old 01-22-2011
vgersh99, thanks for your help (both in this thread and throughout the forums). After searching the forums, I found something that may work (code that you originally worked on!), but I'm having some trouble modifying it.

What I did was create a file called convert, that has the conversions already made:
6px 5px
7px 5px
8px 6px
9px 7px
10px 8px
11px 8px
12px 9px
.....

I also created another file called file (for testing purposes) to test the replacements. I figured if a keyword is found in column one, replace it with the conversion in column two.
Code:
#!/bin/bash

while read line
do
KEY=$(echo $line | awk '{ print $1 }')
VALUE=$(echo $line | awk '{ print $2 }')
sed -e "s/${KEY}/${VALUE}/g" file > file.tmp
mv file.tmp file
done < convert

Since (I believe) awk is used for files in column format, I don't think that this code will work. Is there a way around this?
 

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LEARN ABOUT DEBIAN

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)
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