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
- Perl 6 By Example: Stacked Plots with Matplotlib
- 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!
Sat, 21 Apr 2012
Perl 6 Hackathon in Oslo: Report From The First Day
Yesterday I arrived in the beautiful city of Oslo to attend the Perl 6 Patterns Hackathon. Yesterday we visited a pub, had great discussions, food and beverages, and generally a very good time.
Today we met at 10 am, and got straight to hacking. We are located in an office in the 6th floor of a big building, with a nice view over the center of town, harbor, and even the Holmenkollen.
I worked on the backtrace printer, which in alarmingly many cases reported
Error while creating error string: Method 'message' not found for
invocant of class 'Any', which wasn't too helpful.
It turns out there were actually two causes. One was a subtle error in the
backtrace printer that was triggered by stricter
implementation of the specification, which was easy to find. The
second bug was harder to find, considering that you don't get easily get
backtraces from errors within the backtrace printer. In the end it was the
usage of a code object in boolean context, which turned out to be harmful.
Because regexes are also code objects, and in boolean context they search for
$_ variable and try to match the regex against it.
Which failed. Hard to find, but easy to fix.
My second big project today was database connectivity. Part of it was pestering Jonathan to fix the issues that arose from module precompilation mixed with calling C modules, and testing all the iterations he produced. I'm happy to report that it now works fine, which speeds up development quite a bit.
I also fixed the postgres driver. The root cause for the failing tests turned out to be rather simple too (a missing initialization), so simple that it's embarrassing how long it took me to find out. On the plus side I improved the code quite a bit in passing.
So now all tests in MiniDBI pass, which is a nice milestone, and an indication that we need more tests.
Tomorrow I plan to change the postgres driver to use proper prepared statments.
But the real value of such hackathon comes from interacting with the other hackers. I'm very happy about lots of discussions with other core hackers, as well as feedback and patches from new users and hackers.
At this occasion I'd also like to thank the organizers, Salve J. Nilsen, Karl Rune Nilsen and Jan Ingvoldstad. It has been a great event so far, both fun and productive. You are doing a great service to the Perl 6 community, and to the hackers you have invited.