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Top Forums UNIX for Dummies Questions & Answers Search for a particular word and replace the first character Post 302904610 by Scrutinizer on Thursday 5th of June 2014 06:23:37 AM
Old 06-05-2014
@RudiC, nice use of the "@" placeholder to circumvent the lack of back reference in awk.....

It could be further reduced like this:
Code:
awk '
  BEGIN{
    A["CG"]="CG"
    A["CXG"]="C[ACT]G"
    A["CXX"]="C[ACT][ACT]"
  }
  {
    for(p in A){
      s=$0
      gsub(A[p],"@&",s)
      gsub("@C","NULL",s)
      print s >("FILE_" p "_REPLACE")
    }
  }
' file

This User Gave Thanks to Scrutinizer For This Post:
 

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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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