If you have a Perl-related news item you'd like to share, you may post it in the Perl Newssection.
Please try to avoid duplicating news; but pointers (with summaries) to important stories on other sites are acceptable here.
In a blog post by Dave Cross on the Perl conference in Riga there is this...
The second day started with Liz Mattijsen’s keynote DeMythifying Perl 6. I was surprised when she stated that “Perl 6 has damaged Perl 5” was not a myth, but a fact and was totally blown away when she followed that up with a proposal to rename Perl 6.
Plugin now understands Perl much better and can infer values
of different operations and invocations. Therefore - resolve and completion should be much better in many places. (Seriously,
sometimes it's looks just like a magic.)
Names suggester now taking inferred values into account when
suggesting variable names.
Introduce variable action is now available for the Perl code
Documentation
Pod support has been deeply re-worked and should be much
better now
Quick-doc on built-ins
Quick-doc on completion elements
Better completion, live-templates, smart keys, resolve and
refactoring for POD
Re-worked POD color settings
Mojolicious
Basic project model
Actions to create an application, plugin or lite
application
Because of a music festival it's extremely difficult to find a bed for the night before the talks start on the 7th of August, but I finally found something.
That's why I'm cancelling my other reservation for a 3 bedroom apartment from the 7th till 10th of August. It's only 200 m from the venue and very affordable if you can share.
If interested here is the link
Luxury Riverside 3br Apartment Next to Old Town in Rīga
or to some variation thereof. But this is not how the regex discussion ends in the blog post:
But laziness isn’t the total solution to this backtracking behaviour. Changing the catastrophic example .*.*=.*; to .*?.*?=.*?; doesn’t change its run time at all. x=x still takes 555 steps and x= followed by 20 x’s still takes 5,353 steps.
The only real solution, short of fully re-writing the pattern to be more specific, is to move away from a regular expression engine with this backtracking mechanism. Which we are doing within the next few weeks.
I am guessing this is politically driven: Some people at Cloudflare want to use Rust and this snafu is a convenient excuse.
Another angle to consider is that of personnel. The postmortem does not dwell on the fact that this regular expression made it through review. Meaning that not only the person who wrote the regular expression was unaware of the backtracking potential of the above, but neither did the reviewer.
Thanks to Corion and the Frankfurt.pm team for their rendering work and to Lee Johnson for bringing the EPO equipment (EPO = Enlightened Perl Organisation)!
This will create a text document in a newly created modules directory within your Perl installation directory (by default, C:\berrybrew), named after the version of Perl you exported the module list from (eg: 5.20.3_64). This file has a single distribution name per line.
You can go ahead and edit this file (remove or add as many distribution names as you like), then when you're ready to import into a different Perl instance, simply berrybrew switch to it (note that as always, when switching Perls, you must close the command window and open a new one), then:
This can take a very, very long time, so it's advised to only import on a Perl instance that's newer than Perl you exported from. That, or significantly clean the file up for unneeded distributions.
Another benefit to this system, is that you can manually create a module "bundle" file within the mentioned "modules" directory, and add all distributions you prefer on all of your Perls. So:
create a C:\berrybrew\modules\base_modules_template file
add in any distributions you want to automatically and easily install
switch to the Perl instance you want to install into (or just make this habit for each new install you perform)
run berrybrew modules import base_modules_template to have your custom distribution list installed automatically
You can remove all exported files by using the berrybrew clean modules command, but beware that if you have any manually created export files per above, they will be removed as well. I've got an issue open for the next release so that clean modules leaves any custom files in place.
Most of the other changes were quite minor this round, mainly back-end stuff, doc updates/fixes and test additions/modifications, along with an updated perls.json file with the newly released 5.30 version.
Feedback, as always, is welcome (as are any bug tickets).
Enjoy!
-stevieb
** - we don't actually clone or copy anything; on import, we use cpanm to do a full install of each listed distribution/module, each will have the most recently available production release installed.
The Qualification Round of the Google Code Jam 2019 starts in 5 hours! The round lasts 27 hours, so there should be enough time to gather the needed 30 points.
Perl used to be supported in the Code Jam, but last year, the support was dropped. The great news is Perl support is back! Enjoy rather fresh 5.24.1. See you in the scoreboard!
manwar has started a Perl Weekly Challenge to encourage both those new to Perl and old hands to try solving a weekly problem or two with Perl. Anyone can sign up at any time or just browse the blogged solutions (the first one is from BooK).
Solutions to the challenges are encouraged in either/both Perl or Raku so there should be something for everyone.
Run Configuration to run tests using prove with default IDE tests result UI, (requires Tap::Formatter::Camelcade).
Diff window for a test failure output: got/expected.
Parallel tests running.
Debugging tests (parallel running suppressed).
Runing tests with coverage (parallel running suppressed).
Debugger
Debugger is now displays stringified objects representation if "" operator is overloaded. Additionally, you may
specify custom renderer for any package, using File | Settings | Build, Execution, Deployment | Debugger | Data Views | Perl5
Type Renderers settings (requires debugger module 2019.1), by
@cdalvaro (#1750).
New option for the remote debugging: automatic reconnection. Allows to re-connect to the process until manually stopped, by @djstauffer
(#1369).
Improved resolve for File::Spec::Functions subs. Actual module has tricky exporting, binding OS-specific
implementation in runtime. Plugin for now resolves to the Unix implementations from the File::Spec::Unix, by @grakkpl (#1393).
Bundle::Camelcade module introduced. Installs all modules
that may may be required when working with the perl plugin. Going to be suggested for installation as alternative for particular
modules, #1946.
Automatic injections can now be configured for strings and heredocs using java regular expressions in File | Settings | Editor
| Language Injections, by @Christoffen (#1878).
Support for interpolation in match regex with (?{...}) and (??{...}), #1906.
Truthiness inspection with quickfixes to add explicit defined or string/numeric equality check, by @RickMeasham (#1715).
Fixes
Run Configuration editor now looks less chaotic.
Packages list in Install package action is now split by spaces, commas and semicolons, allowing to install arbitrary
version with cpan, e.g. HURRICUP/Devel-Camelcadedb-v2018.3.0.tar.gz.
Formatting and enter handling for code in replacement regex with e modifier, #1915
