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What is the difference between %INC and @INC in Perl?
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The word "incorporated" indicates that a business entity is a corporation. by Michelle Kaminsky, J.D. updated July 27, 2022 · 2min read. "Inc." is an abbreviation of "incorporated," and both the abbreviation and the full word mean that a company's business structure is a legal corporation.
The @INC array holds all the file system paths where Perl will be looking for modules when you use or require them.
After use or require, the %INC hash will contain the loaded modules and where they were loaded from.
Examples from my laptop:
@INC:
'/etc/perl',
'/usr/local/lib/perl/5.10.0',
'/usr/local/share/perl/5.10.0',
'/usr/lib/perl5',
'/usr/share/perl5',
'/usr/lib/perl/5.10',
'/usr/share/perl/5.10',
'/usr/local/lib/site_perl',
'.'
and %INC:
'warnings/register.pm' => '/usr/share/perl/5.10/warnings/register.pm',
'bytes.pm' => '/usr/share/perl/5.10/bytes.pm',
'XSLoader.pm' => '/usr/lib/perl/5.10/XSLoader.pm',
'Carp.pm' => '/usr/share/perl/5.10/Carp.pm',
'Exporter.pm' => '/usr/share/perl/5.10/Exporter.pm',
'warnings.pm' => '/usr/share/perl/5.10/warnings.pm',
'overload.pm' => '/usr/share/perl/5.10/overload.pm',
'Data/Dumper.pm' => '/usr/lib/perl/5.10/Data/Dumper.pm'
(%INC contains Data::Dumper because I used it to quickly dump those two values).
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See perldoc perlvar for @INC, %INC and all other special variables in Perl.
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