Packages
Learn about packages in Perl.
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A Perl namespace associates and encapsulates various named entities. It’s like our family name or a brand name. Unlike a real-world name, a namespace implies no direct relationship between entities. Such relationships may exist, but they’re not required to.
A package in Perl is a collection of code in a single namespace. The distinction is subtle: the package represents the source code, and the namespace represents the internal data structure Perl uses to collect and group that code.
Declaring a package
The package built-in declares a package and a namespace:
package MyCode;our @boxes;sub add_box { ... }
Package scope
All global variables and functions declared or referred to after the package
declaration refer to symbols within the MyCode namespace. We can refer to
the @boxes variable from the main namespace only by its fully qualified name
of @MyCode::boxes. A ...