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Top Forums Shell Programming and Scripting How to delete all leading empty lines in a file? Post 302464601 by ctsgnb on Wednesday 20th of October 2010 01:46:02 PM
Old 10-20-2010
Quote:
Originally Posted by scottn
Hi.

I suppose there are other ways, but here's one:

Code:
$ awk 'NF { X=1 } X' input.txt
test

Test
$>

As I am a willing-to-learn-awk-noobzor
...could you please explain the code ? thx
 

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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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