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Perl IO vs GLOB symbols

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Top Forums Shell Programming and Scripting Perl IO vs GLOB symbols
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Old 07-03-2008
Error Perl IO vs GLOB symbols
Hi,

Can someone please clarify how we are able to use both IO and GLOB symbols of a package variable interchangeably?

Please consider the following code:
Code:
open(FH,"myfile") || die "Unable to open file myfile:$@";
my $glob_var = *main::FH{GLOB};
my $io_var = *main::FH{IO};
print $glob_var "From glob\n";
print $io_var "From IO\n";
close FH;

Now 'myfile' contains,
Code:
From glob
From IO

Thanks,
Srini
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LEARN ABOUT SUSE

locale::constants

Locale::Constants(3pm)					 Perl Programmers Reference Guide				    Locale::Constants(3pm)

NAME

       Locale::Constants - constants for Locale codes

SYNOPSIS

	   use Locale::Constants;

	   $codeset = LOCALE_CODE_ALPHA_2;

DESCRIPTION

       Locale::Constants defines symbols which are used in the four modules from the Locale-Codes distribution:

	       Locale::Language
	       Locale::Country
	       Locale::Currency
	       Locale::Script

       Note: at the moment only Locale::Country and Locale::Script support more than one code set.

       The symbols defined are used to specify which codes you want to be used:

	       LOCALE_CODE_ALPHA_2
	       LOCALE_CODE_ALPHA_3
	       LOCALE_CODE_NUMERIC

       You shouldn't have to "use" this module directly yourself - it is used by the three Locale modules, which in turn export the symbols.

KNOWN BUGS AND LIMITATIONS

       None at the moment.

SEE ALSO

       Locale::Language
	   Codes for identification of languages.

       Locale::Country
	   Codes for identification of countries.

       Locale::Script
	   Codes for identification of scripts.

       Locale::Currency
	   Codes for identification of currencies and funds.

AUTHOR

       Neil Bowers <neil@bowers.com>

COPYRIGHT

       Copyright (C) 2002-2004, Neil Bowers.

       Copyright (C) 2001, Canon Research Centre Europe (CRE).

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

perl v5.12.1							    2010-05-13						    Locale::Constants(3pm)