Perl: Modules and Packages

Perl Modules and Packages:

Keywords related to modules:

Use Module-name: Adding modules

Use Module-name qw/functionname/; #导入具体的函数

Use Module-name qw//; #不导入具体函数, you need to call the function with a full path

Use Module-name {}; #同上

Do

No

Import

Package

Require

Compile command:

Use constant VAR = VAL; Acting on the entire package, declaring constants

Use Diagnostics; Act on the entire program, find relevant information and output

Use Lib ' PATH '; All modules that are loaded later, tell Perl where to find the module first

Use strict; acting on lexical scopes, strict grammar checking

Use VARs qw/var1 var2 .../; Act on the entire package, declaring certain global variables

Use warnings; Warning messages within the control block

Perl: Modules and Packages