精通Perl:利用Modern::Perl提升编程效率

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"现代Perl文档是一份全面且详细的Perl编程参考,旨在帮助初学者和有经验的Perl开发者更好地理解和利用Perl5的高级特性。这份文档介绍了一种被称为Modern Perl的编程风格,这种风格强调使用社区发明和发展的最佳实践,如惯用语法、CPAN模块的充分利用,以及编写具有‘Perl味道’的高效代码。文档还涵盖了如何运行Modern Perl程序,通常以包含`#!/usr/bin/perl`和`use Modern::Perl;`的基本框架开始。此外,对于涉及测试的代码段,文档推荐使用`use Test::More;`来构建测试框架。书中的示例代码适用于Perl5.10或更高版本,尽管一些例子可能需要调整以适应早期的Perl5版本。" 在现代Perl中,关键知识点包括: 1. **Perl语言的历史与演变**:Perl从最初的系统管理工具发展为通用编程语言,有着丰富的代码资产(Perl5),并且继续向Perl6演进。 2. **Modern Perl的概念**:Modern Perl是指利用Perl5的最新特性和社区的最佳实践进行编程的方式,如使用`use strict`和`use warnings`来增强代码的可靠性和可读性。 3. **CPAN(Comprehensive Perl Archive Network)**:Perl社区的中央仓库,提供了大量的模块,使得开发者可以方便地扩展和复用代码,提高开发效率。 4. **惯用语和编程风格**:Modern Perl鼓励使用简洁、清晰的代码结构和表达式,以提升代码的可读性和可维护性。 5. **Perl 5.10及以上版本的新特性**:例如,say函数、smart match操作符 (`~~`)、数组和哈希的列表赋值等,这些新特性增强了Perl的表达能力和灵活性。 6. **测试框架**:通过`Test::More`模块,开发者可以编写出结构化的测试用例,确保代码的正确性。 7. **代码示例**:文档提供了许多示例代码,帮助读者理解如何在实际编程中应用Modern Perl的理念和技术。 8. **Perl的版本兼容性**:虽然文档侧重于Perl5.10及更高版本,但也指出了一些例子可以在早期版本上运行,但可能需要适配工作。 通过深入学习这个文档,开发者不仅能掌握Perl5的基础,还能了解到如何利用现代的Perl实践来编写更高效、更易于维护的代码,从而成为一名更出色的Perl程序员。
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A Perl expert can solve a problem in a few lines of well-tested code. Now you can unlock these powers for yourself. Modern Perl teaches you how Perl really works. It's the only book that explains Perl thoroughly, from its philosophical roots to the pragmatic decisions that help you solve real problems--and keep them solved. You'll understand how the language fits together and discover the secrets used by the global Perl community. This beloved guide is now completely updated for Perl 5.22. When you have to solve a problem now, reach for Perl. When you have to solve a problem right, reach for Modern Perl. Discover how to scale your skills from one-liners to asynchronous Unicode-aware web services and everything in between. Modern Perl will take you from novice to proficient Perl hacker. You'll see which features of modern Perl will make you more productive, and which features of this well-loved language are best left in the past. Along the way, you'll take advantage of Perl to write well-tested, clear, maintainable code that evolves with you. Learn how the language works, how to take advantage of the CPAN's immense trove of time-tested solutions, and how to write clear, concise, powerful code that runs everywhere. Specific coverage explains how to use Moose, how to write testable code, and how to deploy and maintain real-world Perl applications. This new edition covers the new features of Perl 5.20 and Perl 5.22, including all the new operators, standard library changes, bug and security fixes, and productivity enhancements. It gives you what you need to use the most up-to-date Perl most effectively, all day, every day. What You Need: Perl 5.16 or newer (Perl 5.20 or 5.22 preferred). Installation/upgrade instructions included. Table of Contents Chapter 1. The Perl Philosophy Chapter 2. Perl and Its Community Chapter 3. The Perl Language Chapter 4. Operators Chapter 5. Functions Chapter 6. Regular Expressions and Matching Chapter 7. Objects Chapter 8. Style and Efficacy Chapter 9. Managing Real Programs Chapter 10. Perl Beyond Syntax Chapter 11. What to Avoid Chapter 12. Next Steps with Perl