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Full Discussion: awk condition
Top Forums Shell Programming and Scripting awk condition Post 302923097 by ken6503 on Thursday 30th of October 2014 12:18:15 PM
Old 10-30-2014
Quote:
Originally Posted by RudiC
That's what they call "conditional assignment", it's using "?" and ":" to separate the TRUE and FALSE branch:
Code:
a[$1]=      assignment target
a[$1]       logical condition (empty or 0: FALSE; any other value: TRUE)
?           starts TRUE branch
a[$1]" "$3  concatenation of two strings
:           starts FALSE branch
$3          single simple string

man awk is your friend!
Thanks RudiC,

the clear of your explaination likes crystal ball.

Smilie

---------- Post updated at 12:18 PM ---------- Previous update was at 10:06 AM ----------

Quote:
Originally Posted by RavinderSingh13
Hello Ken6503,

Following is the explaination.

a[$1]=a[$1]?a[$1]" "$3:$3
It means we are creating a array whose index is value of $1 and if value of $1 is repeating in the further then we are concatinating the values of all $1 into a single index

Let's say we have a file as follows.

Code:
cat test35
Singh   1       Ravinder        cool
Prince  2       Gurmeet         hot
Singh   3       Tinki           Handome

then to take all Singh and Prince(which is $1's value) into a single row we will use the code as follows and get the output as follows.

Code:
awk  '{a[$1]=a[$1]?a[$1]" "$3:$3}END{for (i in a) print i,a[i]}' test35
Prince Gurmeet
Singh Ravinder Tinki

Hope this helps.

Thanks,
R. Singh
Thanks for your explaination R. Singh.
 

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LEARN ABOUT CENTOS

locale::codes::langext

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

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) 2011-2013 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::LangExt(3)
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