Posts in this category
- Current State of Exceptions in Rakudo and Perl 6
- Meet DBIish, a Perl 6 Database Interface
- doc.perl6.org and p6doc
- Exceptions Grant Report for May 2012
- Exceptions Grant Report -- Final update
- Perl 6 Hackathon in Oslo: Be Prepared!
- Localization for Exception Messages
- News in the Rakudo 2012.05 release
- News in the Rakudo 2012.06 release
- Perl 6 Hackathon in Oslo: Report From The First Day
- Perl 6 Hackathon in Oslo: Report From The Second Day
- Quo Vadis Perl?
- Rakudo Hack: Dynamic Export Lists
- SQLite support for DBIish
- Stop The Rewrites!
- Upcoming Perl 6 Hackathon in Oslo, Norway
- A small regex optimization for NQP and Rakudo
- Pattern Matching and Unpacking
- Rakudo's Abstract Syntax Tree
- The REPL trick
- First day at YAPC::Europe 2013 in Kiev
- YAPC Europe 2013 Day 2
- YAPC Europe 2013 Day 3
- A new Perl 6 community server - call for funding
- New Perl 6 community server now live, accepting signups
- A new Perl 6 community server - update
- All Perl 6 modules in a box
- doc.perl6.org: some stats, future directions
- Profiling Perl 6 code on IRC
- Why is it hard to write a compiler for Perl 6?
- Writing docs helps you take the user's perspective
- Perl 6 Advent Calendar 2016 -- Call for Authors
- Perl 6 By Example: Running Rakudo
- Perl 6 By Example: Formatting a Sudoku Puzzle
- Perl 6 By Example: Testing the Say Function
- Perl 6 By Example: Testing the Timestamp Converter
- Perl 6 By Example: Datetime Conversion for the Command Line
- What is Perl 6?
- Perl 6 By Example, Another Perl 6 Book
- Perl 6 By Example: Silent Cron, a Cron Wrapper
- Perl 6 By Example: Testing Silent Cron
- Perl 6 By Example: Stateful Silent Cron
- Perl 6 By Example: Perl 6 Review
- Perl 6 By Example: Parsing INI files
- Perl 6 By Example: Improved INI Parsing with Grammars
- Perl 6 By Example: Generating Good Parse Errors from a Parser
- Perl 6 By Example: A File and Directory Usage Graph
- Perl 6 By Example: Functional Refactorings for Directory Visualization Code
- Perl 6 By Example: A Unicode Search Tool
- What's a Variable, Exactly?
- Perl 6 By Example: Plotting using Matplotlib and Inline::Python
- A shiny perl6.org site
- Creating an entry point for newcomers
- An offer for software developers: free IRC logging
- Announcing try.rakudo.org, an interactive Perl 6 shell in your browser
- Another perl6.org iteration
- Blackjack and Perl 6
- Why I commit Crud to the Perl 6 Test Suite
- This Week's Contribution to Perl 6 Week 5: Implement Str.trans
- This Week's Contribution to Perl 6
- This Week's Contribution to Perl 6 Week 8: Implement $*ARGFILES for Rakudo
- This Week's Contribution to Perl 6 Week 6: Improve Book markup
- This Week's Contribution to Perl 6 Week 2: Fix up a test
- This Week's Contribution to Perl 6 Week 9: Implement Hash.pick for Rakudo
- This Week's Contribution to Perl 6 Week 11: Improve an error message for Hyper Operators
- This Week's Contribution to Perl 6 - Lottery Intermission
- This Week's Contribution to Perl 6 Week 3: Write supporting code for the MAIN sub
- This Week's Contribution to Perl 6 Week 1: A website for proto
- This Week's Contribution to Perl 6 Week 4: Implement :samecase for .subst
- This Week's Contribution to Perl 6 Week 10: Implement samespace for Rakudo
- This Week's Contribution to Perl 6 Week 7: Implement try.rakudo.org
- What is the "Cool" class in Perl 6?
- Report from the Perl 6 Hackathon in Copenhagen
- Custom operators in Rakudo
- A Perl 6 Date Module
- Defined Behaviour with Undefined Values
- Dissecting the "Starry obfu"
- The case for distributed version control systems
- Perl 6: Failing Softly with Unthrown Exceptions
- Perl 6 Compiler Feature Matrix
- The first Perl 6 module on CPAN
- A Foray into Perl 5 land
- Gabor: Keep going
- First Grant Report: Structured Error Messages
- Second Grant Report: Structured Error Messages
- Third Grant Report: Structured Error Messages
- Fourth Grant Report: Structured Error Messages
- Google Summer of Code Mentor Recap
- How core is core?
- How fast is Rakudo's "nom" branch?
- Building a Huffman Tree With Rakudo
- Immutable Sigils and Context
- Is Perl 6 really Perl?
- Mini-Challenge: Write Your Prisoner's Dilemma Strategy
- Longest Palindrome by Regex
- Perl 6: Lost in Wonderland
- Lots of momentum in the Perl 6 community
- Monetize Perl 6?
- Musings on Rakudo's spectest chart
- My first executable from Perl 6
- My first YAPC - YAPC::EU 2010 in Pisa
- Trying to implement new operators - failed
- Programming Languages Are Not Zero Sum
- Perl 6 notes from February 2011
- Notes from the YAPC::EU 2010 Rakudo hackathon
- Let's build an object
- Perl 6 is optimized for fun
- How to get a parse tree for a Perl 6 Program
- Pascal's Triangle in Perl 6
- Perl 6 in 2009
- Perl 6 in 2010
- Perl 6 in 2011 - A Retrospection
- Perl 6 ticket life cycle
- The Perl Survey and Perl 6
- The Perl 6 Advent Calendar
- Perl 6 Questions on Perlmonks
- Physical modeling with Math::Model and Perl 6
- How to Plot a Segment of a Circle with SVG
- Results from the Prisoner's Dilemma Challenge
- Protected Attributes Make No Sense
- Publicity for Perl 6
- PVC - Perl 6 Vocabulary Coach
- Fixing Rakudo Memory Leaks
- Rakudo architectural overview
- Rakudo Rocks
- Rakudo "star" announced
- My personal "I want a PONIE" wish list for Rakudo Star
- Rakudo's rough edges
- Rats and other pets
- The Real World Strikes Back - or why you shouldn't forbid stuff just because you think it's wrong
- Releasing Rakudo made easy
- Set Phasers to Stun!
- Starry Perl 6 obfu
- Recent Perl 6 Developments August 2008
- The State of Regex Modifiers in Rakudo
- Strings and Buffers
- Subroutines vs. Methods - Differences and Commonalities
- A SVG plotting adventure
- A Syntax Highlighter for Perl 6
- Test Suite Reorganization: How to move tests
- The Happiness of Design Convergence
- Thoughts on masak's Perl 6 Coding Contest
- The Three-Fold Function of the Smart Match Operator
- Perl 6 Tidings from September and October 2008
- Perl 6 Tidings for November 2008
- Perl 6 Tidings from December 2008
- Perl 6 Tidings from January 2009
- Perl 6 Tidings from February 2009
- Perl 6 Tidings from March 2009
- Perl 6 Tidings from April 2009
- Perl 6 Tidings from May 2009
- Perl 6 Tidings from May 2009 (second iteration)
- Perl 6 Tidings from June 2009
- Perl 6 Tidings from August 2009
- Perl 6 Tidings from October 2009
- Timeline for a syntax change in Perl 6
- Visualizing match trees
- Want to write shiny SVG graphics with Perl 6? Port Scruffy!
- We write a Perl 6 book for you
- When we reach 100% we did something wrong
- Where Rakudo Lives Now
- Why Rakudo needs NQP
- Why was the Perl 6 Advent Calendar such a Success?
- What you can write in Perl 6 today
- Why you don't need the Y combinator in Perl 6
- You are good enough!
Sun, 20 Nov 2016
What is Perl 6?
If you're interested, either in this book project or any other Perl 6 book news, please sign up for the mailing list at the bottom of the article, or here. It will be low volume (less than an email per month, on average).
Perl 6 is a programming language. It is designed to be easily learned, read and written by humans, and it is inspired by natural language. It allows the beginner to write in "baby Perl", while giving the experienced programmer freedom of expression, from concise to poetic.
Perl 6 is gradually typed. It mostly follows the paradigm of dynamically typed languages in that it accepts programs whose type safety it can't guarantee during compilation. Unlike many dynamic languages, it accepts and enforces type constraints. Where possible, the compiler uses type annotations to make decisions at compile time that would otherwise only be possible at run time.
Many programming paradigms have influenced Perl 6. You can write imperative, object-oriented and functional programs in Perl 6. Declarative programming is supported through the regex and grammar engine.
Most lookups in Perl 6 are lexical, and the language avoids global state. This makes parallel and concurrent execution of programs easier, as does Perl 6's focus on high-level concurrency primitives. Instead of threads and locks, you tend to think about promises and message queues when you don't want to be limited to one CPU core.
Perl 6 as a language is not opinionated about whether Perl 6 programs should be compiled or interpreted. Rakudo Perl 6, the main implementation, precompiles modules on the fly, and interprets scripts.
Perl 5, the Older Sister
Around the year 2000, Perl 5 development faced major strain from the conflicting desires to evolve and to keep backwards compatibility.
Perl 6 was the valve to release this tension. All the extension proposals that required a break in backwards compatibility were channeled into Perl 6, leaving it in a dreamlike state where everything was possible and nothing was fixed. It took several years of hard work to get into a more solid state.
During this time, Perl 5 also evolved, and the two languages are different enough that most Perl 5 developers don't consider Perl 6 a natural upgrade path anymore, to the point that Perl 6 does not try to obsolete Perl 5 (at least not more than it tries to obsolete any other programming language :-), and the first stable release of Perl 6 in 2015 does not indicate any lapse in support for Perl 5.
Being a relatively young language, Perl 6 lacks the mature module ecosystem that languages such as Perl 5 and Python provide.
To bridge this gap, interfaces exist that allow you to call into libraries written in C, Python, Perl 5 and Ruby. The Perl 5 and Python interfaces are sophisticated enough that you can write a Perl 6 class that subclasses one written in either language, and the other way around.
So if you like a particular Python library, for example, you can simply load
it into your Perl 6 program through the
Why Should I Use Perl 6?
If you like the quick prototyping experience from dynamically typed programming languages, but you also want enough safety features to build big, reliable applications, Perl 6 is a good fit for you. Its gradual typing allows you to write code without having a full picture of the types involved, and later introduce type constraints to guard against future misuse of your internal and external APIs.
Perl has a long history of making text processing via regular expressions (regexes) very easy, but more complicated regexes have acquired a reputation of being hard to read and maintain. Perl 6 solves this by putting regexes on the same level as code, allowing you to name it like subroutines, and even to use object oriented features such as class inheritance and role composition to manage code and regex reuse. The resulting grammars are very powerful, and easy to read. In fact, the Rakudo Perl 6 compiler parses Perl 6 source code with a Perl 6 grammar!
Speaking of text, Perl 6 has amazing Unicode support. If you ask your user for a number, and they enter it with digits that don't happen to be the Arabic digits from the ASCII range, Perl 6 still has you covered. And if you deal with graphemes that cannot be expressed as a single Unicode code point, Perl 6 still presents it as a single character.
There are more technical benefits that I could list, but more importantly, the
language is designed to be fun to use. An important aspect of that is good
error messages. Have you ever been annoyed at Python for typically giving just
SyntaxError: invalid syntax when something's wrong? This error could come
from forgetting a closing parenthesis, for example. In this case, a Perl 6
Unable to parse expression in argument list; couldn't find final ')'
which actually tells you what's wrong. But this is just the tip of the iceberg. The compiler catches common mistakes and points out possible solutions, and even suggests fixes for spelling mistakes.
Finally, Perl 6 gives you the freedom to express your problem domain and solution in different ways and with different programming paradigms. And if the options provided by the core language are not enough, Perl 6 is designed with extensibility in mind, allowing you to introduce both new semantics for object oriented code and new syntax.