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Top Forums Shell Programming and Scripting Adding filename and line number from multiple files to final file Post 302795937 by Don Cragun on Thursday 18th of April 2013 03:49:53 PM
Old 04-18-2013
Quote:
Originally Posted by bioinfo
Thanks a lot Don Cragon for such an extensive explanation and hanson44. Smilie
Does the amount of space between the lines matter or we can write awk program in one line too? Is it for proper readability only?

Thanks.

---------- Post updated at 10:54 AM ---------- Previous update was at 10:36 AM ----------

Hurray!
I got my output. Smilie Smilie
Thanks
If is logically possible to write any awk script as a single line, if you're willing to type it into your shell. If the awk program is in a shell file to be executed, you'll have to restrict the length of each line in your script to the limits supported by your editor. You can also throw away all of the comments and change all of the variable names to single characters to make the script shorter.

I choose to write programs in a way that is easy for me to read and understand rather than to try to artificially produce 1-liners. If you ask me about an awk script I submitted here a month ago, I don't want to deal with the obfuscation caused by collapsing an easily read script into a single line.

If you take a script I supplied, modify it slightly to add a new feature, collapse it to a single line, and then ask me to help you debug your new feature; I will definitely be slower to respond and it will be much more likely that I won't respond at all. Smilie
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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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