Mastering Perl: A Beginner's Guide (Mastering Computer Science)

Chapter 1 ▪ Introduction

EVOLUTION OF PERL

WHY PERL?

PERL FEATURES

PERL APPLICATION

PERL IMPLEMENTATION

PROGRAMMING IN PERL

Comments

Perl’s Benefits

Perl’s Disadvantages

Applications

PERL INSTALLATION AND CONFIGURATION ON WINDOWS, LINUX, AND MACOS

PERL DOWNLOAD AND INSTALLATION

HELLO WORLD PROGRAM

HOW TO EXECUTE A PERL PROGRAM

Windows

Unix/Linux

A PERL PROGRAM’S BASIC SYNTAX

Variables

Expressions

Comments

Statements

Block

Functions or Subroutines

Loops

Whitespaces and Indentation

Keywords

DATA TYPES

Scalars

Arrays

Hashes

NOTE

Chapter 2 ▪ Fundamentals of Perl

PERL CODE WRITING METHODS

Interactive Mode

Script Mode

One-Liner Mode

BOOLEAN VALUES IN PERL

OPERATORS

Arithmetic Operators

Addition

Subtraction

Multiplication

Division

Modulus

Exponent Operator

Relational Operators

Logical Operators

Bitwise Operators

Assignment Operators

Ternary Operator

VARIABLES IN PERL

Naming of a Variable

Declaration of a Variable

Modification of a Variable

Variable Interpolation

VARIABLES AND ITS TYPES

Creating Variables

Scalar Variables

Array Variables

Hash Variables

Variable Context

SCOPE OF VARIABLES

The Scope of Global Variables

Lexical Variables’ Scope (Private Variables)

Package Variables

MODULES IN PERL

Making a Perl Module

Importing and Using a Perl Module

Utilizing Module Variables

Making Use of predefined Modules

PERL PACKAGES

Perl Module Declaration

Making Use of a Perl Module

Using a Different Directory to Access a Package

Utilizing Module Variables

Begin and End Block

NUMBER AND ITS TYPES IN PERL

DIRECTORIES WITH CRUD OPERATIONS IN PERL

Making a New Directory

Opening an Existing Directory

Read Directory in the Scalar and List Context

Modifying Directory Path

Directory Closing

Delete a Directory

NOTES

Chapter 3 ▪ Input and Output in Perl

PERL print() AND say() METHODS

print() Operator

say() Function

print OPERATOR

USE OF STDIN FOR INPUT

Chapter 4 ▪ Control Flow in Perl

DECISION-MAKING IN PERL

if Statement

if else Statement

Nested if Statement

if elsif else ladder Statement

unless Statement

unless else Statement

unless elsif Statement

LOOPS IN PERL

for Loop

foreach Loop

while Loop

Infinite While Loop

do...while loop

until Loop

Nested Loops

given-when STATEMENT

Nested given-when Statement

goto STATEMENT

next OPERATOR

redo OPERATOR

last IN LOOP

NOTES

Chapter 5 ▪ File Handling in Perl

INTRODUCTION OF FILE HANDLING

Using FileHandle To Read and Write to a File

Various File Handling Modes

Redirecting Output

FILE OPENING AND READING

Opening a File

Reading a File

FileHandle Operator

getc Function

read Function

Reading More than One Line at a Time

Exception Handling in Files

Throw an Exception

Give a Warning

WRITING TO A FILE

print() Function

Error Handling and Error Reporting

Throw an Exception (Using Die Function)

Give a Warning (Using Warn Function)

APPENDING TO A FILE

CSV FILE READING

Use of Split() for Data Extraction

Character Escaping a Comma

Installation of the TEXT::CSV

Fields with Newlines Embedded

FILE TEST OPERATORS

FILE LOCKING

flock()

flock() vs lockf()

SLURP MODULE

USEFUL FILE-HANDLING FUNCTIONS

Chapter 6 ▪ Regular Expressions in Perl

OPERATORS IN REGULAR EXPRESSION

REGEX CHARACTER CLASSES

SPECIAL CHARACTER CLASSES IN REGULAR EXPRESSIONS

QUANTIFIERS IN REGULAR EXPRESSION

Quantifier Table

BACKTRACKING IN REGULAR EXPRESSION

BACKTRACKING

“e” MODIFIER IN REGULAR EXPRESSION

The Substitution Operation Is Performed using a Subroutine

REGEX “ee” MODIFIER

When Doing Mathematical Calculations, Use the “ee” Modifier

pos() FUNCTION IN REGULAR EXPRESSION

To Match from a Specified Position, use \G Assertion

REGEX CHEAT SHEET

Character Classes

Anchors

Metacharacters

Quantifiers

Modifiers

White Space Modifiers

Quantifiers – Modifiers

Grouping and Capturing

SEARCHING IN A FILE USING REGEX

Regular Search

Using Word Boundary in the Regex Search

Use of Wildcards in the Regular Expression

Chapter 7 ▪ Object-Oriented Programming in Perl

CLASSES IN OOP

Object

Class

Data Member

Defining a Class

Creating a Class and Making Use of Objects

Creating a Class Instance

Creating an Object

OBJECTS IN OOPs

METHODS IN OOPs

Types of Methods in Perl

get-set Methods

CONSTRUCTORS AND DESTRUCTORS

Constructors

Passing Dynamic Attributes

Destructors

METHOD OVERRIDING IN OOPs

Why Do We Override Methods?

INHERITANCE IN OOPs

Base Class and Derived Class

Multilevel Inheritance

Implementing Inheritance in the Perl

POLYMORPHISM IN OOPs

ENCAPSULATION IN OOPs

NOTE

Chapter 8 ▪ Subroutines in Perl

SUBROUTINES OR FUNCTIONS

Determining Subroutines

Calling Subroutines

Passing Parameters to Subroutines

Passing Hashes to Subroutines

Passing Lists to Subroutines

Returning a Value from a Subroutine

Local and Global Variables in Subroutines

A Varying Number of Parameters in a Subroutine Call

FUNCTION SIGNATURE IN PERL

Defining Subroutines

Function Signature

Passing Parameters of a Type other than that Specified in the Signature

Difference in Number of Arguments

PASSING COMPLEX PARAMETERS TO A SUBROUTINE

MUTABLE AND IMMUTABLE PARAMETERS

Mutable Parameters

Immutable Parameters

Traits

MULTIPLE SUBROUTINES

Subroutine Definition

Use of the “multi” Keyword

return() FUNCTION

REFERENCES IN PERL

Making a Reference

Dereferencing

PASS BY REFERENCE

PERL RECURSION

APPRAISAL

BIBLIOGRAPHY

INDEX