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Top Forums Shell Programming and Scripting Isolate and Extract a Pattern Substring (Digits Only) Post 302303775 by netfreighter on Friday 3rd of April 2009 12:06:07 PM
Old 04-03-2009
I also tried
Code:
awk ' /[[:digit:]]/ { print $1 } ' repfile

but $1 or $2 only map to "words", whichmeans those digit squences that have some separator or blank, therefore only some or the desired numbers are filtered out, the others that are surrounded by grabage characters without a break or space remain unfiltered.
Any idea how to awk the desired PATTERN only?
 

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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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