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Perl Programming Documentation, also called perldoc, is the name of the user manual for the Perl 5 programming language. It is available in several different formats, including online in HTML and PDF. The documentation is bundled with Perl in its own format, known as Plain Old Documentation (pod).
The United Nations Democracy Fund (UNDEF) was created by UN Secretary-General Kofi A. Annan in 2005 as a United Nations General Trust Fund to support democratization efforts around the world. It was welcomed [ 1 ] by the General Assembly in the Outcome Document of the 2005 World Summit (A/RES/60/1, paragraphs 136–137) and was created by the ...
Uninitialized scalars will have the value undef; uninitialized arrays or hashes will be (). [5] Perl also has a local operator that does not create automatic variables, [6] instead giving global (package) variables a temporary value, which is dynamically scoped to the enclosing block. When the scope of the variable is left, the old value is ...
In computing (particularly, in programming), undefined value is a condition where an expression does not have a correct value, although it is syntactically correct. An undefined value must not be confused with empty string, Boolean "false" or other "empty" (but defined) values.
Pod is the language used for most documentation in the Perl world. This includes Perl itself, nearly all publicly released modules, many scripts, most design documents, many articles on Perl.com and other Perl-related web sites, and the Parrot virtual machine.
Perl 5.6.1 and newer support autovivification of file and directory handles. [3] Calling open() on an undefined variable will set it to a filehandle. According to perl561delta, "[t]his largely eliminates the need for typeglobs when opening filehandles that must be passed around, as in the following example:
The structure of the Perl programming language encompasses both the syntactical rules of the language and the general ways in which programs are organized. Perl's design philosophy is expressed in the commonly cited motto "there's more than one way to do it".
perldoc: Extend the generator classes through Perl programming. Only linking pdoc: overridable Jinja2 templates source code syntax highlighting, automatic cross-linking to symbol declarations Yes phpDocumentor: Smarty-based templates (1.x), Twig-based templates (2+) class inheritance diagrams