11-08-2014
That's a documented behavior in Perl and is called "autovivification".
Check the stackoverflow website for the question "How do I disable autovivification in Perl?" for a detailed discussion and workarounds.
gandolf989 has a point here. Any reason you do *not* want the intermediate branches to be created? As long as they are empty and your existence checks return the values as expected, your program should be fine.
Autovivification in Perl is by design. It's not a bug; it's a feature. And I think it stems from Perl's tendency to go out of its way to make your text processing task easy.
For an in-depth technical discussion of why it works like that, what its advantages are and what problems it solves, check this link:
http://www.sysarch.com/Perl/autoviv.txt
This User Gave Thanks to durden_tyler For This Post:
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perl::critic::policy::codelayout::requiretidycode
Perl::Critic::Policy::CodeLayout::RequireTidyCode(3) User Contributed Perl Documentation Perl::Critic::Policy::CodeLayout::RequireTidyCode(3)
NAME
Perl::Critic::Policy::CodeLayout::RequireTidyCode - Must run code through perltidy.
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
Conway does make specific recommendations for whitespace and curly-braces in your code, but the most important thing is to adopt a
consistent layout, regardless of the specifics. And the easiest way to do that is to use Perl::Tidy. This policy will complain if you're
code hasn't been run through Perl::Tidy.
CONFIGURATION
This policy can be configured to tell Perl::Tidy to use a particular perltidyrc file or no configuration at all. By default, Perl::Tidy is
told to look in its default location for configuration. Perl::Critic can be told to tell Perl::Tidy to use a specific configuration file
by putting an entry in a .perlcriticrc file like this:
[CodeLayout::RequireTidyCode]
perltidyrc = /usr/share/perltidy.conf
As a special case, setting "perltidyrc" to the empty string tells Perl::Tidy not to load any configuration file at all and just use
Perl::Tidy's own default style.
[CodeLayout::RequireTidyCode]
perltidyrc =
SEE ALSO
Perl::Tidy
AUTHOR
Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>
COPYRIGHT
Copyright (c) 2005-2011 Imaginative Software Systems. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of this license
can be found in the LICENSE file included with this module.
perl v5.16.3 2014-06-09 Perl::Critic::Policy::CodeLayout::RequireTidyCode(3)