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E-raamat: Beginning Perl

4.57/5 (36 hinnangut Goodreads-ist)

Curtis Poe (Software Engineer, Weborama.com)

Formaat: PDF+DRM
Ilmumisaeg: 29-Aug-2012
Kirjastus: Wrox Press
Keel: eng
ISBN-13: 9781118221877

Teised raamatud teemal:

Programming & scripting languages: general

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Formaat: PDF+DRM
Ilmumisaeg: 29-Aug-2012
Kirjastus: Wrox Press
Keel: eng
ISBN-13: 9781118221877

Teised raamatud teemal:

Programming & scripting languages: general

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Presents an overview of the Perl programming language, and offers exercises, advice, and examples to demonstrate how to use it, covering CPAN, control flow, subroutines, directories, packages, and moose syntaxes.

Everything beginners need to start programming with Perl

Perl is the ever-popular, flexible, open source programming language that has been called the programmers’ Swiss army knife. This book introduces Perl to both new programmers and experienced ones who are looking to learn a new language. In the tradition of the popular Wrox Beginning guides, it presents step-by-step guidance in getting started, a host of try-it-out exercises, real-world examples, and everything necessary for a Perl novice to start programming with confidence.

Introduces Perl to both new programmers and experienced ones who want to learn a new language
Provides a host of real-world applications for today's environments so readers can get started immediately
Covers the new features of Perl but fully applicable to previous editions

Beginning Perl provides the information and instruction you need to confidently get started with Perl.

For Instructors: Classroom and training support material are available for this book.

Introduction

xxiii

Chapter 1 What Is Perl?

(24)

Perl Today

(1)

Getting Perl

(1)

Working with Non-Windows Platforms: perlbrew

(2)

Using Windows

(2)

The Perl Community

(1)

IRC

(1)

PerlMonks

(1)

Perl Mongers

(1)

StackOverflow

(2)

Using perldoc

(1)

Understanding the Structure of perldoc

(1)

Getting Started with perldoc

(1)

Using Tutorials and FAQs

(2)

Using the perldoc -f function

(1)

Using a Terminal Window

(1)

Using the Command Line

(1)

Creating a Work Directory

(2)

Creating Hello, World!

(1)

Writing Your First Program

(3)

Shebang Lines

(1)

Summary

(3)

Chapter 2 Understanding The Cpan

(16)

CPAN and METACPAN

(1)

Finding and Evaluating Modules

(2)

Downloading and Installing

(4)

CPAN Clients

(1)

Using the CPAN.pm Client

(2)

Using the Cpanm Client

(1)

PPM

(1)

CPAN::Mini

(3)

Summary

(2)

Chapter 3 Variables

(42)

What Is Programming?

(1)

A Few Things to Note Before Getting Started

(1)

strict, warnings, and diagnostics

(1)

The my Function

(1)

Sigils

(1)

Identifiers

(1)

Scalars

(1)

Strings

(4)

Numbers

(2)

Arrays

(1)

Breaking Down the Code

(1)

Accessing Elements

(3)

Iterating over Arrays

(1)

Hashes

(1)

Accessing Elements

(1)

Iterating Over Hashes

(1)

Adding Data to Hashes

(1)

Slices

(1)

Array Slices

(1)

Hash Slices

(1)

Context

(1)

Scalar Context

(1)

List Context

(3)

Scope

(1)

My Variables

(2)

Package Variables

(3)

Strict, Warnings, and Diagnostics

(2)

strict

(1)

warnings

(1)

diagnostics

(1)

Working Without a Net

(2)

Perl's Built-in Variables

(1)

%ENV

(1)

@ARGV

(1)

Other Special Variables

(1)

Summary

(2)

Chapter 4 Working With Data

(42)

Using Scalars

(1)

Working with Strings

(9)

Using String Operators

(3)

Scalar::Util

(1)

Numeric Builtins

(5)

Bitwise Operators

103

(1)

Understanding Booleans

103

(5)

Assignment Operators

108

(1)

Precedence and Associativity

109

(2)

Array and List Functions

111

(1)

Built-in Array Functions

111

(5)

List::Util

116

(1)

Built-in Hash Functions

116

(1)

delete()

116

(1)

exists()

117

(1)

keys()

117

(1)

values()

117

(1)

each()

117

(2)

Scoping Keywords

119

(1)

my()

119

(1)

local()

119

(1)

our()

120

(1)

state()

120

(1)

Summary

121

(4)

Chapter 5 Control Flow

125

(32)

Using the if Statement

126

(1)

Understanding Basic Conditionals

126

(2)

else/elsif/unless

128

(3)

The Ternary Operator?

131

(1)

for/foreach loops

132

(1)

Arrays

132

(3)

Lists

135

(1)

C-Style

136

(6)

Using while/until Loops

142

(1)

Lists

143

(1)

last/next/redo/continue

144

(2)

Labels

146

(1)

Statement Modifiers

147

(1)

Types of Statement Modifiers

147

(2)

Do while/do until

149

(2)

given/when

151

(1)

Basic Syntax

151

(2)

The Switch Module

153

(1)

Summary

154

(3)

Chapter 6 References

157

(18)

References 101

158

(1)

Array References

158

(1)

Hash References

159

(1)

Anonymous References

160

(3)

Other References

163

(3)

Working with References

166

(1)

Debugging

166

(3)

Copying

169

(3)

Slices

172

(1)

Summary

173

(2)

Chapter 7 Subroutines

175

(44)

Subroutine Syntax

176

(1)

Argument Handling

177

(1)

Multiple Arguments

178

(1)

Named Arguments

179

(2)

Aliasing

181

(1)

State Variables (Pre- and Post-5.10)

181

(3)

Passing a List, Hash, or Hashref?

184

(2)

Returning Data

186

(1)

Returning True/False

186

(2)

Returning Single and Multiple Values

188

(1)

wantarray

189

(1)

FAIL!

190

(1)

"Wake Up! Time to Die!"

191

(1)

Carp and croak

192

(1)

eval

192

(2)

evalGotchas

194

(1)

Try::Tiny

195

(1)

Subroutine References

196

(1)

Existing Subroutines

196

(1)

Anonymous Subroutines

197

(1)

Closures

197

(3)

Prototypes

200

(1)

Argument Coercion

200

(2)

More Prototype Tricks

202

(2)

Mimicking Builtins

204

(2)

Forward Declarations

206

(1)

Prototype Summary

207

(2)

Recursion

209

(1)

Basic Recursion

209

(1)

Divide and Conquer

210

(1)

Memoization

211

(4)

Things to Watch For

215

(1)

Argument Aliasing

215

(1)

Scope Issues

216

(1)

Doing Too Much

216

(1)

Too Many Arguments

217

(1)

Summary

217

(2)

Chapter 8 Regular Expressions

219

(30)

Basic Matching

220

(1)

Quantifiers

221

(2)

Escape Sequences

223

(3)

Extracting Data

226

(2)

Modifiers and Anchors

228

(3)

Character Classes

231

(1)

Grouping

232

(3)

Advanced Matching

235

(1)

Substitutions

235

(1)

Lookahead/Lookbehind Anchors

236

(2)

Named Subexpressions (5.10)

238

(3)

Common Regular Expression Issues

241

(1)

Regexp::Common

241

(1)

E-mail Addresses

242

(1)

HTML

242

(1)

Composing Regular Expressions

243

(2)

Summary

245

(4)

Chapter 9 Files And Directories

249

(38)

Basic File Handling

250

(1)

Opening and Reading a File

250

(8)

File Test Operators

258

(2)

The Diamond Operator

260

(1)

Temporary Files

260

(1)

DATA as a File

261

(1)

binmode

262

(3)

Directories

265

(1)

Reading Directories

265

(1)

Globbing

265

(1)

Unicode

266

(1)

What Is Unicode?

267

(1)

Two Simple Rules

267

(4)

Lots of Complicated Rules

271

(5)

Useful Modules

276

(1)

File::Find

276

(2)

File::Path

278

(1)

File::Find::Rule

279

(5)

Summary

284

(3)

Chapter 10 Sort, Map, And Grep

287

(28)

Basic Sorting

288

(1)

Sorting Alphabetically

288

(1)

Sorting Numerically

289

(1)

Reverse Sorting

290

(1)

Complex Sort Conditions

290

(2)

Writing a sort Subroutine

292

(1)

Sorting and Unicode Fun!

293

(4)

Map and grep

297

(1)

Using grep

298

(5)

Using map

303

(2)

Aliasing Issues

305

(1)

Trying to Do Too Much

306

(1)

Trying to Be Clever

307

(1)

Putting It All Together

308

(1)

Schwartzian Transform (aka decorate, sort, undecorate)

308

(2)

Guttman-Rosler Transform

310

(1)

Summary

311

(4)

Chapter 11 Packages And Modules

315

(38)

Namespaces and Packages

316

(5)

Use Versus require

321

(2)

Package Variables

323

(3)

Version Numbers

326

(1)

Subroutines in Other Packages

327

(1)

Exporting

327

(3)

Naming Conventions

330

(5)

BEGIN, UNITCHECK, CHECK, INIT, and END

335

(1)

BEGIN blocks

336

(1)

END Blocks

337

(1)

INIT, CHECK, and UNITCHECK Blocks

337

(1)

Plain Old Documentation (POD)

338

(2)

Documentation Structure

340

(1)

Headings

340

(1)

Paragraphs

341

(1)

Lists

341

(1)

Verbatim

342

(1)

Miscellaneous

342

(2)

Creating and Installing Modules

344

(1)

Creating a Simple Module

344

(5)

Makefile.PL or Module::Build?

349

(1)

Summary

349

(4)

Chapter 12 Object Oriented Perl

353

(46)

What Are Objects? The Ævar the Personal Shopper

354

(1)

Three Rules of Perl OO

355

(1)

Class Is a Package

355

(1)

An Object Is a Reference That Knows Its Class

356

(2)

A Method Is a Subroutine

358

(13)

Objects - Another View

371

(1)

Using TV::Episode

371

(3)

Subclassing

374

(1)

Using TV::Episode::Broadcast

375

(4)

Class Versus Instance Data

379

(2)

A Brief Recap

381

(1)

Overloading Objects

381

(4)

Using UNIVERSAL

385

(2)

Understanding Private Methods

387

(6)

Gotchas

393

(1)

Unnecessary Methods

393

(1)

"Reaching Inside"

394

(1)

Multiple Inheritance

394

(3)

Summary

397

(2)

Chapter 13 Moose

399

(40)

Understanding Basic Moose Syntax

400

(2)

Using Attributes

402

(3)

Using Constructors

405

(3)

Understanding Inheritance

408

(1)

Taking Care of Your Moose

409

(4)

Advanced Moose Syntax

413

(1)

Using Type Constraints

414

(3)

Using Method Modifiers

417

(3)

Understanding and Using Roles

420

(5)

Exploring MooseX

425

(3)

Rewriting Television::Episode

428

(5)

Moose Best Practices

433

(1)

Use namespace::autoclean and Make Your Class Immutable

434

(1)

Never Override new()

434

(1)

Always Call Your Parent BUILDARGS Method

434

(1)

Provide Defaults if an Attribute is Not Required

434

(1)

Default to Read-Only

434

(1)

Put Your Custom Types in One Module and Give Them a Namespace

435

(1)

Don't Use Multiple Inheritance

435

(1)

Always Consume All Your Roles at Once

435

(1)

Summary

436

(3)

Chapter 14 Testing

439

(42)

Basic Tests

440

(1)

Using Test::More

440

(2)

Writing Your Tests

442

(1)

Understanding the prove Utility

443

(1)

Understanding Test::More Test Functions

444

(1)

Using ok

445

(1)

Using is

445

(3)

Using like

448

(1)

Using is_deeply

449

(1)

Using SKIP

450

(1)

Using TODO

450

(1)

Using eval {}

451

(1)

Using use_ok and require_ok

452

(1)

Working with Miscellaneous Test Functions

453

(4)

Using Other Testing Modules

457

(1)

Using Test::Differences

457

(2)

Using Test::Exception

459

(1)

Using Test::Warn

460

(1)

Using Test::Most

460

(1)

Understanding xUnit Style Using Testing

461

(1)

Using Test::Class

461

(2)

A Basic Test Class

463

(4)

Extending a Test Class

467

(4)

Using Test Control Methods

471

(2)

Calling Parent Test Control Methods

473

(4)

Summary

477

(4)

Chapter 15 The Interwebs

481

(42)

A Brief Introduction to HTTP

482

(2)

Plack

484

(1)

Hello, World!

484

(6)

Handling Parameters

490

(2)

Templates

492

(4)

Handling POST Requests

496

(4)

Sessions

500

(11)

Web Clients

511

(1)

Extracting Links from Web Pages

512

(2)

Extracting Comments from Web Pages

514

(1)

Filling Out Forms Programmatically

515

(5)

Summary

520

(3)

Chapter 16 Databases

523

(22)

Using the DBI

524

(1)

Connecting to a Database

524

(3)

Using SQLite

527

(1)

Using DBD::SQLite

527

(6)

Selecting Basic Data

533

(1)

Using SELECT Statements

533

(3)

Using Bind Parameters

536

(3)

Inserting and Updating Data

539

(1)

Creating Transactions

540

(1)

Handling Errors

541

(1)

Summary

542

(3)

Chapter 17 Plays Well With Others

545

(22)

The Command Line

546

(1)

Reading User Input

546

(2)

Handling Command-Line Arguments

548

(3)

perlrun

551

(5)

Other Programs

556

(1)

Running an External Program

556

(3)

Reading Another Program's Output

559

(1)

Writing to Another Program's Input

560

(2)

STDERR

562

(3)

Summary

565

(2)

Chapter 18 Common Tasks

567

(44)

Using CSV Data

568

(1)

Reading CSV Data

569

(1)

Writing CSV Data

570

(1)

Understanding Basic XML

571

(1)

Reading CSV Data

572

(4)

Writing CSV Data

576

(4)

Handling Dates

580

(1)

Using the DateTime Module

580

(1)

Using Date::Tiny and DateTime::Tiny

581

(6)

Understanding Your Program

587

(1)

Using the Debugger

587

(7)

Profiling

594

(10)

Perl::Critic

604

(4)

Summary

608

(3)

Chapter 19 The Next Steps

611

(44)

What Next?

612

(1)

What This Book Covers

612

(1)

What This Book Leaves Out

613

(1)

Understanding Object-Relational Mappers

613

(1)

Understanding DBIx::Class

614

(1)

Understanding Basic DBIx::Class Usage

614

(4)

Understanding the Pros and Cons of an ORM

618

(6)

Using DBIx::Class::Schema::Loader

624

(1)

Using the Template Toolkit

625

(1)

Why Use Templates?

625

(1)

An Introduction to Template Toolkit

626

(8)

Using Catalyst to Build Apps

634

(1)

The Beauty of MVC

635

(1)

Setting Up a Catalyst Application

635

(6)

Using Catalyst Views

641

(2)

Using Catalyst Models

643

(3)

Using Catalyst Controllers

646

(2)

CRUD: Create, Read, Update, and Delete

648

(3)

Summary

651

(4)

Appendix: Answers To Exercises

655

(40)

Index

695

Curtis "Ovid" Poe has specialized in Perl since 2000. He is an author, a regular guest speaker at conferences across Europe and the United States, and he wrote the test harness that currently ships with the Perl language.

"This is not your everyday Beginning Perl book. Not only does Ovid provide splendid coverage of Perl's basics and best practices, he also covers modern Perl techniques and modules, where Perl's real power lies. [ It] is like being given Batman's utility belt: you have everything you need to do truly amazing things. If Perl were a shark, this book would teach you how to outfit it with lasers." —Paul Fenwick, Perl Training Australia

Wrox Beginning guides are crafted to make learning programming languages and technologies easier than you think, providing a structured, tutorial format that will guide you through all the techniques involved.

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