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.
Table of Contents (15 chapters)

Channels

Channels are the communication mean that can be used for passing data from one piece of code to another. The great thing about channels is that they are thread-compatible, thus it is possible for different threads to talk to each other. In this section, we will learn how to use channels in Perl 6.

Basic use cases

Channels are defined by the Channel class. To create a new channel variable, call the constructor:

my $channel = Channel.new;

Now, we can send data to the channel using the send method and receive it with the receive method:

my $channel = Channel.new;
$channel.send(42);

my $value = $channel.receive();
say $value;

This program does a trivial thing—it sends the value to the channel and reads it immediately...