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Full Discussion: regular expression foreign language
Top Forums Shell Programming and Scripting regular expression foreign language Post 302361462 by wakatana on Tuesday 13th of October 2009 08:45:50 AM
Old 10-13-2009
regular expression foreign language
Hello all,
I read somewher that regular expressions work with ASCII table so when i type
Code:
grep "[a-z][a-z]*" file_name

it uses values from ACII dec97(a) to dec122(z), right ?
But if I have file containing diacritics, lets say (ordinary Slovak language characters):
Code:
marek@cepi:~$ cat diakritika 
áôúéťľúľščťžýáíéôäúú
ÁôúÉŤĽÚĽŠČŤŽÝÁÍÉôäÚÚ

marek@cepi:~$ grep -o "[a-z][a-z]*" diakritika 
áôúéťľúľščť
ýáíéôäúú
ôú
ôä

Why this regexp know diacritics? And why know only lower case and not "ž" ??? This is strange for me. Friend told me it could be something with $LANG. So my $LANG is:
Code:
marek@cepi:~$ echo $LANG
en_US.UTF-8

Also I would ask if I want uppercase file with diacritic i type:
Code:
marek@cepi:~$ cat diakritika | tr "[:lower:]" "[:upper:]"
áôúéťľúľščťžýáíéôäúú
ÁôúÉŤĽÚĽŠČŤŽÝÁÍÉôäÚÚ

why it not change lower to upper ?
Thanks a lot for reply
PS: I hope that characters display properly
 

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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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