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Full Discussion: awk problem with syntax
Top Forums Shell Programming and Scripting awk problem with syntax Post 302869055 by Don Cragun on Tuesday 29th of October 2013 02:38:26 PM
Old 10-29-2013
Quote:
Originally Posted by SkySmart
your assumption is right on target! thank you.

i just thought of a different possibility, what happens if i want to exclude (for the string 'lemons') all lines that contain the word 'only'?

so in your output, if the lemon lines containing 'only' are excluded, then, the count should be:

Code:
dogs=4,lemons=2

The trivial way is to special case "lemons" and "only" by changing the line:
Code:
                if ($0 ~ a[w])

to:
Code:
                if ($0 ~ a[w] && (a[w] != "lemons" || $0 !~ "only"))

But, if you decide to change basic logic in your original requirements, you should consider whether you need to redesign everything so that each counted pattern has a list of zero or more exclusions that should be considered. (And, I'm not going to try to guess at your new requirements and propose a new syntax for your sw variable to make that happen.)

Quick prototyping works well sometimes. But, sitting down and clearly defining your requirements before you start programming will usually give you a much more coherent, maintainable piece of software that works better and does what you want.
 

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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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