It the last operator day here in the Moose-Pen

Hey everyone,

Following is the p5p (Perl 5 Porters) mailing list summary for the past week.

Enjoy!

I've had a few discussions with people about why I wrote Keyword::DEVELOPMENT, a useful, but simple module. In short, it lets you do this:

About a week ago, I published London Perl Workshop 2017 - Report. In the previous blog, I didn't mention anything about the talks I attended. So this blog would focus more on that. First sorry for late review, no excuse is good enough.

Its penultimate operator day here in the Moose-Pen

See also my previous reports on news.perlfoundation.org (Aug/Sep, Oct) and blogs.perl.org (Aug/Sep, Oct).

In November, I was working over 40 hours on YAML related stuff.

I’m happy to announce that this year I’m going to be running a Mojolicious advent calendar from my new “semi-official Mojolicious website” at https://mojolicious.io/blog/. I won’t cross post here every day, though maybe I will do a few, say the most interesting/code-filled ones.

The first one is already up, a quick Getting Started to get the ball rolling.

The site itself is brand new, using Statocles and a nice theme I found online. The main pages are starkly lacking in content so far, but the blog is off and running! Hope to see you there!

Two weeks ago, I was invited to meta::hack v2, the second annual MetaCPAN hackathon. As the primary maintainer of CPAN Testers, I went to continue improving the integration of CPAN Testers data with MetaCPAN and generally improve the performance of CPAN Testers to the benefit of the entire Perl ecosystem.

Its solipsism day here in the Moose Pen

Getting down to the last few operators on my list and today I will hopefully be an easy one 'Exists'

Eevee:

Perl has the strange property that its data structures try very hard to spill their contents all over the place. Despite having dedicated syntax for arrays – @foo is an array variable, distinct from the single scalar variable $foo – it’s actually impossible to nest arrays.

my @foo = (1, 2, 3, 4);
my @bar = (@foo, @foo);
# @bar is now a flat list of eight items: 1, 2, 3, 4, 1, 2, 3, 4

The idea, I guess, is that an array is not one thing. It’s not a container, which happens to hold multiple things; it is multiple things. Anywhere that expects a single value, such as an array element, cannot contain an array, because an array fundamentally is not a single value.

And so we have “references”, which are a form of indirection, but also have the nice property that they’re single values.

This is a common thing for people to find weird about Perl. Really though it’s just a different default.

Perl’s reference-taking operator is simply dual with the splat operator in Ruby and recent Javascript.

... and have blogged about it here!

We held a Perl 5 Porters Hackathon in Amsterdam October 12-15. This was our 2nd attempt to bring active porters together to sort out issues that might otherwise take months to sort out. We got quite a bit done.

Deprecation of $[

Last year, we went over all of the long-standing deprecations in core. All but $[ were given an official EOL. $[ was not because we could not come up with a plan.

There are 3 use cases we expect are going on:

• using $[ in a conditional
• Assigning to $[
• Assigning to $[ but making it = 0 which doesn't do anything.

Very few modules on CPAN even mention $[. I provided a grep from the grep.metacpan.org backend. We determined there's roughly 100 lines of code on CPAN which would need to be fixed to eliminate the usage of $[ on CPAN. Ilmari offered to submit patches to fix them.

You can see a more rough list here:
https://grep.metacpan.org/search?q=%5C%24%5C%5B%5Cs*%3D&qd=&qft=

Its one more operator day here in the Moose-pen

Today I am finally going to get around to the last two of my operators the 'Like' and 'Not Like'. This is where we get into sort a sticky wicket and we are entering the realm of 'regular expression' queries which may work quite differently on the various SQL boxes and I know 100% different in MongoDB and other non SQL dbs. So what to do??

WHERE  first_name LIKE 'Bob'

The just-released v0.03 of GraphQL::Plugin::Convert::OpenAPI provides a plugin to convert a given OpenAPI specification (the spec formerly known as Swagger) to a GraphQL schema.

There is also now a sample OpenAPI applet for Mojolicious::Lite. It provides a GraphQL interface to the superb CPAN Testers REST API. Here is an example query:

On Saturday (25th November), the London Perl Workshop (LPW) was held at the University of Westminster. It was a free-to-attend one-day conference that three tracks of talks and one of tutorials. It was also the first in the post-Mark Keating age. This is the report of this year's organising team: Katherine, Lee, Neil, Pete, and Rick.

In brief, the talks went down well and everyone seemed to enjoy themself. Read on for more!

I attended LPW 2017 on Saturday, 25th Nov 2017 at University of Westminster. It was such a great experience. I must admit, it was the best ever I attended so far. So all credit goes to the organizers and sponsors.

This time, I was prepared to give my second talk at London Perl Workshop. The topic of my talk was "Create tube map in 20 minutes using Map::Tube". I was scheduled to give the talk at 10:00AM. However the speaker of the talk just prior to my talk didn't turn up on time for some reason, I was then asked by Sawyer, if I am willing to give my talk earlier than the scheduled time. I said Yes without any hesitation. The only concern I had was about those who shown interest in my talk in advance are going to miss it.

For those who missed my talk, please download the slides here.

It is catch up day here in the Moose-Pen.

Hey everyone,

Following is the p5p (Perl 5 Porters) mailing list summary for the past two weeks.

Enjoy!

Ah, the joys of conference-driven development. DRYing your Perl Tests is now out, probably going to be a series, maybe even a book. It's just a quick take on refactoring test suites in Perl 6. Maybe it goes too far, but at least it goes somewhere. I actually promised this before London Perl Workshop 2017 and made it almost on time.

Perlito5 is an implementation of the Perl5 language that runs in the Java / JVM platform.

jrunscript now works with the "Perl5" language parameter:

$ jrunscript -cp .:perlito5.jar -l Perl5
perl> push @INC, "src5/lib"
1
perl> use Env qw/ HOME /;

perl> say $HOME
/Users/fglock
1
perl>