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10. Subroutines

Introduction

Accessing Subroutine Arguments
Making Variables Private to a Function
Creating Persistent Private Variables
Determining Current Function Name
Passing Arrays and Hashes by Reference
Detecting Return Context
Passing by Named Parameter
Skipping Selected Return Values
Returning More Than One Array or Hash
Returning Failure
Prototyping Functions
Handling Exceptions
Saving Global Values
Redefining a Function
Trapping Undefined Function Calls with AUTOLOAD
Nesting Subroutines
Program: Sorting Your Mail
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