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Preface
1．Introduction
Questions and Answers
What Does“Perl”Stand For？
HowCanIGet Perl？
HOW Do I Make a Perl Program？
A Whirlwind Tour of Perl
Exercises
2．ScaIar Data
Numbers
Strings
Peris Built-in Warnings
Scalar Variables
oUtpUt Wlth print
The if Control Structure
Getting User InpUt
The chomp operator
The while Control Structure
The undef Value
The defined Function
Exercises
3．Lists and Arrays
Accessing Elements of an Array
Special Array Indices
L1St Literals
L1‘st Assignment
Interpolating Arrays I‘nto Strings
The fOreach Control Structure
Scalar and LiSt Context
<STDIN>in LiSt Context
Exercises
4．Subroutines
Definlng a Subroutine
Invoking a Subroutine
Return Values
Arguments
Private Variables in Subroutines
Variable-Length Parameter Lists
Nores on Lexical(my)Variables
The use strict Pragma
The return operator
Non-Scalar Return Values
Exercises
5．Input and Output
Input from Standard InpUt
InpUt from the Diamond operator
The Invocation Arguments
output to Standard output
Formatted Output with pringf
Filehandles
opening a Filehandle
Fatal Errors with die
Using Filehandles
Reopening a Standard Filehandle
Exercises
6．Hashes
What Is a Hash?
Hash Element Access
Hash Functions
Typical Use of a Hash
Exercises
7．IntheWo rId 0fReguIar Expressions
What Are Regular Expressions?
Using Simple Patterns
Character Classes
Exercises
8．Matching with ReguIar ExpressiOns
Marches with m//
optlon Modifjers
Anchors
The Binding operator，=～
Interpolating into Patterns
The Match Variables
General Quantifiers
Precedence
A Pattern Test Program
Exercises
9．Processing Text with Regular Expressions
SubStltUtions With s///
The split Operator
The join Function
m//in List Context
More PowerfuI Regular Expressions
Exercises
10．More Control Structures
The urlless Control Structure
The until Control Structure
Expression Modifiers
The Naked Block Control Structure
The elsif Clause
Autoincrement and Autodecrement
The for Control Structure
Loop Controls
Logical Operators
Exercise
11．File Tests
File Test operators
The star and lstat Functions
The localtltime Function
BltwiSe Operators
Using the Special Underscore Filehandle
Exercises
12．Directory Operations
Movlng Around the Directory Tree
Globbing
An Alternate Syntax for Globbing
Directorv Handles
RecursiVe Directory Listing
Manipulating Files and Dlrectories
Removlng Files
Renaming Files
Links and Files
Making and Removing Dlrectorles
Modifying Permissions
Changing ownership
Changing Timestamps
Exerclses
13．Strings and Sorting
Finding a Substrlng Wlth index
Manipulating a Substrng Wth SUbstr
Formattng Data With sprintf
Advanced Sortlng
ExeFcises
14．Process Management
The svstem Function
The exec Function
The Envronment Variables
Using Backquotes to Capture Output
Processes as Filehandles
Getting Down and Dirty with fork
Sending and Receiving Signals
Exercises
15. Perl Modules
Finding Modules
Installing Modules
Using Simple Modules
Exercise
16. Some Advanced PerlTechniques
Trapping Errors with eval
Picking Items from a List with grep
Transforming Items from a List with map
Unquoted Hash Keys
Slices
EXercise
A. Exercise Answers
B. Beyondthe Llama
Index
