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Full Discussion: awk text editing
Top Forums UNIX for Dummies Questions & Answers awk text editing Post 302906974 by Higgo on Wednesday 25th of June 2014 03:13:42 AM
Old 06-25-2014
Question awk text editing
Dear all,

I'm starting to learn programming, and I'm having some problem with awk text editing.

I'm having a huge text file, and my goal is to print "something" before every 4th row starting from the second row.

File example:
Code:
AAAAA
BBBBBB
CCCCC
DDDDD
AAAAAAA
BBBBBBBB
CCCCCCC
DDDDDDD
AAAAAAAAA
BBBBBBBBBB
CCCCCCCCC
DDDDDDDDD
etc.

The desired output would be the following:
Code:
AAAAA
XXXXXBBBBBB
CCCCC
DDDDD
AAAAAAA
XXXXXBBBBBBBB
CCCCCCC
DDDDDDD
AAAAAAAAA
XXXXXBBBBBBBB
CCCCCCCCC
DDDDDDDDD
etc.

I have written an awk one liner, but its not working, it only print the wanted letters before to the last BBB.

This is what i ran in command line:
Code:
b=`wc -l input.txt | awk '{print $1}'`; for ((i=2; i<=$b ; i+=4)); do awk -v i=$i '{if (NR==i) print "NANE"$0; else print $0}' input.txt > output.txt; done

I would really appreciate your help!

Thanks,
Higgo
Last edited by Scrutinizer; 06-25-2014 at 04:18 AM.. Reason: CODE tags
 

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LEARN ABOUT OSX

locale::codes::langext

Locale::Codes::LangExt(3pm)				 Perl Programmers Reference Guide			       Locale::Codes::LangExt(3pm)

NAME

       Locale::Codes::LangExt - standard codes for language extension identification

SYNOPSIS

	  use Locale::Codes::LangExt;

	  $lext = code2langext('acm');		       # $lext gets 'Mesopotamian Arabic'
	  $code = langext2code('Mesopotamian Arabic'); # $code gets 'acm'

	  @codes   = all_langext_codes();
	  @names   = all_langext_names();

DESCRIPTION

       The "Locale::Codes::LangExt" module provides access to standard codes used for identifying language extensions, such as those as defined in
       the IANA language registry.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default IANA language
       registry codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language extensions. A code set may be specified using either a name, or
       a constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lext = code2langext('acm','alpha');
	  $lext = code2langext('acm',LOCALE_LANGEXT_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from the IANA language registry, such as 'acm' for Mesopotamian Arabic.

	   This is the default code set.

ROUTINES

       code2langext ( CODE [,CODESET] )
       langext2code ( NAME [,CODESET] )
       langext_code2code ( CODE ,CODESET ,CODESET2 )
       all_langext_codes ( [CODESET] )
       all_langext_names ( [CODESET] )
       Locale::Codes::LangExt::rename_langext  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangExt::add_langext  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangExt::delete_langext  ( CODE [,CODESET] )
       Locale::Codes::LangExt::add_langext_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangExt::delete_langext_alias  ( NAME )
       Locale::Codes::LangExt::rename_langext_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangExt::add_langext_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangExt::delete_langext_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.iana.org/assignments/language-subtag-registry
	   The IANA language subtag registry.

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2012 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.16.2							    2012-10-11					       Locale::Codes::LangExt(3pm)
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