Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Perl 6 Deep Dive
  • Table Of Contents Toc
  • Feedback & Rating feedback
Perl 6 Deep Dive

Perl 6 Deep Dive

By : Shitov
3 (4)
close
close
Perl 6 Deep Dive

Perl 6 Deep Dive

3 (4)
By: 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)
close
close

Method postfix operators

In Chapter 4, Working with Operators, we did not cover the set of special postfix operators, which are related to object-oriented programming. Now it is time to fill that gap. The operators described in this section are the syntactic constructions but they may all be considered postfix operators.

To call a method on an object, the dot operator is used. We have been using it many times in this chapter:

class A {
method m() {
return 42;
}
}

my $o = A.new; # calling the 'new' method
say $o.m(); # calling the 'm' method

If the method does not exist, say, if you call $o.n(), then the call fails:

No such method 'n' for invocant of type 'A'

To prevent the raise of an exception, the .? form of the method call operator can help:

say $o.?m(); # 42
say $o.?n(); # Nil

An existing method is called as usual, while...

Unlock full access

Continue reading for free

A Packt free trial gives you instant online access to our library of over 7000 practical eBooks and videos, constantly updated with the latest in tech

Create a Note

Modal Close icon
You need to login to use this feature.
notes
bookmark search playlist download font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Delete Note

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Edit Note

Modal Close icon
Write a note (max 255 characters)
Cancel
Update Note

Confirmation

Modal Close icon
claim successful

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY