Book Image

Perl 6 Deep Dive

By : Andrew Shitov
Book Image

Perl 6 Deep Dive

By: Andrew Shitov

Overview of this book

Perl is a family of high-level, general-purpose, interpreted, dynamic programming languages consisting of Perl 5 and Perl 6. Perl 6 helps developers write concise and declarative code that is easy to maintain. This book is an end-to-end guide that will help non-Perl developers get to grips with the language and use it to solve real-world problems. Beginning with a brief introduction to Perl 6, the first module in the book will teach you how to write and execute basic programs. The second module delves into language constructs, where you will learn about the built-in data types, variables, operators, modules, subroutines, and so on available in Perl 6. Here the book also delves deeply into data manipulation (for example, strings and text files) and you will learn how to create safe and correct Perl 6 modules. You will learn to create software in Perl by following the Object Oriented Paradigm. The final module explains in detail the incredible concurrency support provided by Perl 6. Here you will also learn about regexes, functional programming, and reactive programming in Perl 6. By the end of the book, with the help of a number of examples that you can follow and immediately run, modify, and use in practice, you will be fully conversant with the benefits of Perl 6.

Related Content you might be interested in

Current Title:

Small book image
Perl 6 Deep Dive
Andrew Shitov
Sep, 2017 | 402 pages
No titles found
Table of Contents (15 chapters)
Free Chapter
1
What is Perl 6?
What is Perl 6?
Origins of Perl 6
Differences from Perl 5
Perl 6 resources
Compilers
Working with Rakudo Star
Writing our Hello World program
Summary
2
Writing Code
Writing Code
Using Unicode
Whitespaces and unspaces
Comments
Creating Pod documentation
Phasers
Simple input and output
Summary
3
Working with Variables and Built-in Data Types
Working with Variables and Built-in Data Types
Using variables
Using simple built-in data types
Data types to manipulate date and time
Summary
4
Working with Operators
Working with Operators
Operator classification
Operators in Perl 6
Meta-operators in Perl 6
User-defined operators
Summary
5
Control Flow
Control Flow
Understanding code blocks and variable scoping
Conditional checks
Using loops
Executing code once
Collecting data with gather and take
Setting the topic with given
Summary
6
Subroutines
Subroutines
Creating and calling subroutines
Type constraints
Multi subs
Nested subroutines
Creating operators
Passing functions as arguments
Anonymous subs
Summary
7
Modules
Modules
Creating a module
Using modules
Introspection
Using zef
Summary
8
Object-Oriented Programming
Object-Oriented Programming
Creating a class
Working with attributes
Working with methods
More about attributes
Class methods
Inheritance
Appending objects and classes using roles
Using introspection to learn more
Method postfix operators
Summary
9
Input and Output
Input and Output
Standard input and output
Working with files and directories
Reading from a stream
Writing to a stream
Summary
10
Working with Exceptions
Working with Exceptions
The try block
Soft failures
The CATCH phaser
The Exception object
The Failure object
Creating custom exceptions
Summary
11
Regexes
Regexes
Matching against regexes
Literals
Character classes
Creating repeated patterns with quantifiers
Extracting substrings with capturing
Using alternations in regexes
Positioning regexes with anchors
Looking forward and backward with assertions
Modifying regexes with adverbs
Substitution and altering strings with regexes
Summary
12
Grammars
Grammars
Creating a grammar
Using rules and tokens
Using actions
Using abstract syntax tree attributes
Using the actions class
The whole program
Summary
13
Concurrent Programming
Concurrent Programming
Junctions
Threads
Promises
Channels
Summary
14
Functional Programming
Functional Programming
What is functional programming?
Using recursion
Using reduction
Higher-order functions and lambdas
Piping data and feed operators
Manipulating the scope
Creating and using iterators
Lazy and infinite lists
Summary
15
Reactive Programming
Reactive Programming
What is reactive programming?
On-demand supplies
Live supplies
Summary

Summary

In this chapter, we discussed about regexes in Perl 6. They share many common ideas with regular expressions in Perl 5 but also offer many fascinating new things. We examined the methods of constructing regexes and matching with text, learned how to extend the power of a regex engine by using character classes, written by you or built-in. We also looked at the way Perl 6 stores results in the Match object and how to make substitution and replacement in strings using regexes.

In the next chapter, we will meet an even more powerful tool that tremendously extends regexes, grammars.

Previous Section
End of Chapter 11
Next Chapter