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Full Discussion: Pattern Matching in PERL
Top Forums Shell Programming and Scripting Pattern Matching in PERL Post 302594397 by Scrutinizer on Tuesday 31st of January 2012 08:44:58 AM
Old 01-31-2012
awk in bash/ksh93 shell:
Code:
awk -F '[ \t,]*' 'NR==FNR{A[$1];next}{for (i=1;i<=NF;i++) if ($i in A) {print;next}}' <(gzcat file1.gz) <(gzcat file2.gz) | gzip > outfile.gz

awk only:
Code:
awk -F '[ \t,]*' -v if1=file1.gz -v if2=file2.gz -v of=outfile.gz  'BEGIN{
  cmd="gzip>"of
  while("gzcat "if1 | getline){A[$1]}
  while("gzcat "if2 | getline){for (i=1;i<=NF;i++) if ($i in A) {print | cmd ;i=NF+1}}
}'


Last edited by Scrutinizer; 01-31-2012 at 10:37 AM..
 

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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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