Perl 6 Deep Dive
Data manipulation, concurrency, functional programming, and more
1st Edition
Published on 8. July 2025
402 pages
978-1-78712-345-8 (ISBN)
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Shitov Andrew :
Andrew Shitov has been a Perl enthusiast since the end of the 1990s, and is the organizer of over 30 Perl conferences in eight countries. He worked as a developer and CTO in leading web-development companies, such as Art. Lebedev Studio, Booking dotCom, and eBay, and he learned from the "Fathers of the Russian Internet", Artemy Lebedev and Anton Nossik. Andrew has been following the Perl 6 development since its beginning in 2000. He ran a blog dedicated to the language, published a series of articles in the Pragmatic Perl magazine, and gives talks about Perl 6 at various Perl events. In 2017, he published the Perl 6 at a Glance book by DeepText, which was the first book on Perl 6 published after the first stable release of the language specification.
Andrew Shitov has been a Perl enthusiast since the end of the 1990s, and is the organizer of over 30 Perl conferences in eight countries. He worked as a developer and CTO in leading web-development companies, such as Art. Lebedev Studio, Booking dotCom, and eBay, and he learned from the "Fathers of the Russian Internet", Artemy Lebedev and Anton Nossik. Andrew has been following the Perl 6 development since its beginning in 2000. He ran a blog dedicated to the language, published a series of articles in the Pragmatic Perl magazine, and gives talks about Perl 6 at various Perl events. In 2017, he published the Perl 6 at a Glance book by DeepText, which was the first book on Perl 6 published after the first stable release of the language specification.
Content
- Cover
- Copyright
- Credits
- About the Author
- Acknowledgements
- About the Reviewer
- www.PacktPub.com
- Customer Feedback
- Table of Contents
- Preface
- Chapter 1: What is Perl 6?
- Origins of Perl 6
- Differences from Perl 5
- Sigils
- Signatures
- Classes
- Compatibility with Perl 5
- Perl 6 resources
- Documentation
- Test Suite
- STD.pm
- Community
- Compilers
- Parrot
- Pugs
- Perlito
- Rakudo
- Working with Rakudo Star
- Downloading and installing Rakudo Star
- Command-line options
- The -c command
- The --doc command
- The -e command
- The -h and --help commands
- The -n command
- The -p command
- The -I and -M commands
- The -v and --version command
- The --stagestats command
- Writing our Hello World program
- Summary
- Chapter 2: Writing Code
- Using Unicode
- Whitespaces and unspaces
- Comments
- One-line comments
- Multiline comments
- Embedded comments
- Creating Pod documentation
- The =begin / =end Pod block
- Phasers
- Simple input and output
- Summary
- Chapter 3: Working with Variables and Built-in Data Types
- Using variables
- Declaring variables
- Variable containers in Perl 6
- Scalars
- Arrays
- Methods of the Array type
- Hashes
- Methods of the Hash class
- Naming conventions
- Typed variables
- Using simple built-in data types
- Integer data type
- Methods of the Int type
- Converting to a character using the chr method
- Checking whether the number is prime
- Generating a random number
- Getting the sign of the value
- Calculating the square root of the value
- Getting the next and previous values
- Getting the absolute value
- Rational data type
- Methods of the Rat type
- Getting the Perl representation of the value
- Converting to an Int value
- Getting the numerator and denominator
- Methods for rounding the value
- Methods pred and succ
- Numeric data type
- Num versus Numeric versus Real
- Enumerations
- Boolean data type
- Methods of the Bool type
- Using pred and succ
- Methods to generate random Boolean values
- String data type
- Methods of the Str class
- Converting register
- Methods to cut strings
- Methods to check the content of a string
- Length of the string
- Reversing a string
- Complex numbers
- Methods of the Complex data type
- Getting real and imaginary parts
- Data types to manipulate date and time
- Using the Date class
- Using the DateTime data type
- Summary
- Chapter 4: Working with Operators
- Operator classification
- Categories of operators
- Operators as functions
- Operators in Perl 6
- Infix operators
- Assignment operators
- Operators for multiplication and division
- Operators for addition and subtraction
- Modulo operator
- Divisibility operator
- Integer division and modulo operators
- Bitwise operators
- Integer shift operators
- String logical operators
- Boolean logical operators
- Great common divisor and least common multiple operators
- String repetition operator
- List repetition operator
- String concatenation operator
- Junction operators
- The does operator
- The but operator
- Universal comparison operator
- String comparison operator leg
- Comparison operator for Real numbers
- Range creating operator
- Equality and non-equality operators
- Numerical comparison operators
- String comparison operators eq and ne
- Other string comparison operators
- The before and after operators
- Equivalency test operator
- Value identity operator
- Bound check operator
- Smartmatch operator
- Approximate-equality operator
- Boolean logical operators
- Defined-or operator
- Operators for minimum and maximum
- Pair creation operator
- Comma operator
- Invocant separator
- Zip operator
- Cross operator
- Sequence operator
- Binding operators
- Logical operator with lower precedence
- Data pipe operators
- Ternary operator ?? !!
- Prefix operators
- Increment and decrement operators ++ and --
- Boolean coercion operator
- Boolean negation operator
- Numeric coercion operator
- Numeric negation operator
- String coercion operator
- Two-complement binary negation operator
- Boolean coercion and negation operator
- The upto operator
- The temp operator
- The let operator
- The not operator
- The so operator
- Postfix operators
- Object-oriented postfix operators
- Increment and decrement operators
- Circumfix operators
- Quote-word operator
- Group operator
- Hash or block creation operator
- Postcircumfix operators
- Positional access operator
- Element access operators
- Invoke operator
- Meta-operators in Perl 6
- Assignment meta-operator
- Negation meta-operator
- Reverse meta-operator
- Reduction meta-operator
- Cross meta-operator
- Zip meta-operator
- Hyper-operators
- User-defined operators
- Summary
- Chapter 5: Control Flow
- Understanding code blocks and variable scoping
- The do keyword
- Conditional checks
- Using loops
- The loop cycle
- The for loop
- Using while, until, and repeat
- Breaking the loop
- Using labels
- Executing code once
- Collecting data with gather and take
- Setting the topic with given
- Summary
- Chapter 6: Subroutines
- Creating and calling subroutines
- Default values
- Optional parameters
- Named parameters
- Parameter traits
- Slurpy parameters
- Parameter placeholders
- Type constraints
- Typed parameters
- Return type
- Multi subs
- An example
- Nested subroutines
- Creating operators
- Passing functions as arguments
- Anonymous subs
- Summary
- Chapter 7: Modules
- Creating a module
- Using modules
- The need keyword
- The import keyword
- The use keyword
- The require keyword
- Scoping
- More on is export
- Exporting variables
- Selective import
- Introspection
- Using zef
- Installing a module
- Searching for a module
- Uninstalling modules
- zef command summary
- How Rakudo stores modules
- Summary
- Chapter 8: Object-Oriented Programming
- Creating a class
- Working with attributes
- Read-and-write attributes
- Typed attributes
- Using other classes as data types
- Working with methods
- Private methods
- More about attributes
- Public and private attributes
- Automatic getters and setters
- Class attributes
- Class methods
- Inheritance
- Inheriting from a class
- Using child class instances as objects of a base class
- Overriding methods
- Submethods
- Multiple inheritance
- Appending objects and classes using roles
- Using introspection to learn more
- Method postfix operators
- Summary
- Chapter 9: Input and Output
- Standard input and output
- Working with files and directories
- Opening a file
- Closing a file
- Testing file and directory properties
- Manipulating files
- Working with directories
- Reading from a stream
- Reading a single line
- Reading characters
- Lazy readers
- The eof method
- Writing to a stream
- The print function
- The say method
- Example of using the gist method
- The printf method
- Characters and strings
- Integers
- Floating-point numbers
- Summary
- Chapter 10: Working with Exceptions
- The try block
- The $! variable
- Soft failures
- The CATCH phaser
- The Exception object
- Throwing exceptions
- Resuming from exceptions
- Typed exceptions
- Rethrowing exceptions
- The Failure object
- Creating custom exceptions
- Summary
- Chapter 11: Regexes
- Matching against regexes
- Literals
- Character classes
- The . (dot) character
- Backslashed character classes
- \s and \S characters
- \t and \T characters
- \h and \H characters
- \v and \V characters
- \n and \N characters
- \d and \D characters
- \w and \W characters
- Character classes
- Predefined subrules
- Using Unicode properties
- Character class arithmetics
- Creating repeated patterns with quantifiers
- Greediness
- Extracting substrings with capturing
- Capturing groups
- The Match object
- Named captures
- Using alternations in regexes
- Positioning regexes with anchors
- Matching at the start and at the end of lines or strings
- Matching word boundaries
- Looking forward and backward with assertions
- Modifying regexes with adverbs
- :i (:ignorecase)
- :s (:sigspace)
- :p (:pos)
- :g (:global)
- :c (:continue)
- :r (:ratchet)
- :ov (:overlap)
- :ex (:exhaustive)
- Substitution and altering strings with regexes
- Summary
- Chapter 12: Grammars
- Creating a grammar
- Matching a grammar
- Using rules and tokens
- Using actions
- Using abstract syntax tree attributes
- Handling expressions
- Using the actions class
- The whole program
- Summary
- Chapter 13: Concurrent Programming
- Junctions
- Autothreading
- Threads
- Starting a thread
- Creating and running a new thread
- The id and name methods
- Printing thread objects as a string
- Lifetime threads
- Using locks in Perl 6
- Promises
- Creating a promise
- Statuses of a promise
- Factory methods
- The result of a promise
- Combining promises
- Executing code after the promise is kept or broken
- The anyof and allof methods
- Channels
- Basic use cases
- To wait or not to wait?
- Closing channels
- Channels as queues
- Summary
- Chapter 14: Functional Programming
- What is functional programming?
- Using recursion
- Using reduction
- Higher-order functions and lambdas
- The WhateverCode blocks
- Piping data and feed operators
- Manipulating the scope
- Closures
- Currying
- Dynamic scope
- Creating and using iterators
- Lazy and infinite lists
- Summary
- Chapter 15: Reactive Programming
- What is reactive programming?
- On-demand supplies
- Generating data with supplies
- The react and whenever keywords
- Using lists as the source of the supply data
- Live supplies
- Filtering and transforming data streams
- Summary
- Index
