Chapter 4. Subroutines

Item 23: Understand the difference between my and local .

Item 24: Avoid using @_ directlyunless you have to.

Item 25: Use wantarray to write subroutines returning lists.

Item 26: Pass references instead of copies.

Item 27: Use hashes to pass named parameters.

Item 28: Use prototypes to get special argument parsing.

Item 29: Use subroutines to create other subroutines.