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Full Discussion: Generating all possible combinations of values in field 1 (awk)
Top Forums UNIX for Dummies Questions & Answers Generating all possible combinations of values in field 1 (awk) Post 302905697 by Scrutinizer on Friday 13th of June 2014 05:16:22 AM
Old 06-13-2014
awk:
Code:
awk '{A[$1]=$2; for(i in A)if(!(i~"(^|\\+)" $1 "$")){c=i"+"$1; A[c]=A[i]+$2; print c, A[c]}}' FS=\| OFS=\| file

-- multiline --
Code:
awk '
  {
    A[$1]=$2
    for(i in A) if(!(i~"(^|\\+)" $1 "$")) {
      c=i "+" $1
      A[c]=A[i]+$2
      print c, A[c]
    }
  }
' FS=\| OFS=\| file



--
To produce sorted output, it could be combined with sort:
Code:
awk '
  {
    A[$1]=$2
    for(i in A) if(!(i~"(^|\\+)" $1 "$")) {
      c=i "+" $1
      A[c]=A[i]+$2
      print length(c), c, A[c]
    }
  }
' FS=\| OFS=\| file | sort -nt\| | cut -d\| -f2-


Code:
A+B|3
A+C|4
A+D|5
B+C|5
B+D|6
C+D|7
A+B+C|6
A+B+D|7
A+C+D|8
B+C+D|9
A+B+C+D|10

Last edited by Scrutinizer; 06-13-2014 at 07:03 AM..
These 3 Users Gave Thanks to Scrutinizer For This Post:
Akshay Hegde beca123456 SriniShoo
 

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LEARN ABOUT CENTOS

locale::codes::langfam

Locale::Codes::LangFam(3)				User Contributed Perl Documentation				 Locale::Codes::LangFam(3)

NAME

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

SYNOPSIS

	  use Locale::Codes::LangFam;

	  $lext = code2langfam('apa');		       # $lext gets 'Apache languages'
	  $code = langfam2code('Apache languages');    # $code gets 'apa'

	  @codes   = all_langfam_codes();
	  @names   = all_langfam_names();

DESCRIPTION

       The "Locale::Codes::LangFam" module provides access to standard codes used for identifying language families, such as those as defined in
       ISO 639-5.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 639-5
       language family codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language families. 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 = code2langfam('apa','alpha');
	  $lext = code2langfam('apa',LOCALE_LANGFAM_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from ISO 639-5 such as 'apa' for Apache languages.

	   This is the default code set.

ROUTINES

       code2langfam ( CODE [,CODESET] )
       langfam2code ( NAME [,CODESET] )
       langfam_code2code ( CODE ,CODESET ,CODESET2 )
       all_langfam_codes ( [CODESET] )
       all_langfam_names ( [CODESET] )
       Locale::Codes::LangFam::rename_langfam  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangFam::add_langfam  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangFam::delete_langfam  ( CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangFam::delete_langfam_alias  ( NAME )
       Locale::Codes::LangFam::rename_langfam_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::delete_langfam_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.loc.gov/standards/iso639-5/id.php
	   ISO 639-5 .

AUTHOR

       See Locale::Codes for full author history.

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

COPYRIGHT

	  Copyright (c) 2011-2013 Sullivan Beck

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

perl v5.16.3							    2013-02-27						 Locale::Codes::LangFam(3)
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