Last week I gave a "Faster Perl 6 Programs" talk at the Toronto Perl Mongers, whom I thank for letting me speak.
For google hangout that is usually set up, we got to use the fancy equipment provided by the company that was letting us use their space. Unfortunately,
it's currently unclear if the hangout was recorded and if there would be a video
of the talk.
So, I figured I'd make a screencast of the talk. You won't get some of the discussions that occurred during the meeting, but the content of the talk
itself is pretty much identical.
I was just about to add in the next operator on my, the 'Like' command but before I did that I added a few more tests for the 'in' operator and with this test;
Recently GraalVM 1.0 been released which can run Ruby, JavaScript and other dynamic and static languages on top at super fast speeds.
I have decided to see how Perl 6 will run on top of it.
If successful that should allow us to run Perl 6 hopefully very fast and use Java, Ruby and JavaScript libraries without paying a interoperability price.
Truffle which is what we are using is a language implementation frameworks that creates an efficient JIT from a (sufficiently annotated) AST interpreter written in Java.
After missing a year last year, I came back to attend YAPC this year. (Yes, yes: “The Perl Conference,” now. But it’ll probably always be “YAPC” to me.) And I actually spoke again (second time), this time on dates and my Date::Easy module. If you missed it and are interested in watching it, the video is up.
This year was in Salt Lake City again, and, while I normally don’t like repeating cities (mainly because I like visiting new places instead), I do have to say the Little America Hotel is every bit the excellent venue that I remembered. Plus it’s just barely close enough to where I live that I can drive there and take the whole family, and do a sort of “conferenscation.” Which is what we did.
I've requested The Perl Foundation to cancel my currently running grant "Perl 6 Bugfixing and Performance of Rationals / Fixing Constraints on Constants" on the grounds that a more detailed investigation into proposed features that occurred during the course of the grant showed many of them to be unwanted or unimplementable.
Since any further grant's work now differs significantly from what the TPF and community voted on, I prefer to cancel the grant and perform any of the remaining work on a volunteer basis, whenever I get a chance.
No payments will be made for any of the completed work to date and it is to be deemed to have been performed on a volunteer basis.
Summary of Changes from Original Proposal and Reasons for Cancellation
Now that I have a few little API things worked out from yesterday's post I better carry on and do the next two 'operators' 'In' and 'Not In'
My original though was these two operators would now require a little parameter validation like I did for the 'Between' as most of us know the very common form of an SQL 'In' queries one like these two;
SELECT * FROM users WHERE id in (SELECT user_id FROM drivers) ;
SELECT * FROM users WHERE id in (109,100,22) ;
should just be handled by the present type and coercion code in the system but I just read that this form of SQL
SELECT * FROM users WHERE id in (SELECT user_id FROM drivers,22) ;
A group of Perl companies are sponsoring the COED:ETHICS conference, a one-day conference on ethics for developers and technologists, which is in London on July 13th.
For the past decade or more, perldoc.perl.org has been a useful and convenient resource for viewing perl documentation online. However, it has suffered from lack of maintenance and mounting unfixed issues over the past few years. Being familiar with the excellent Mojolicious documentation site and how it also can display core perldocs, I reasoned that such features would be simple to provide in this modern framework. And so, what would become perldoc.pl (thanks to a domain acquired by pink_mist) was born.
Many people moved from GitHub to GitLab after annoucing that microsoft bought GitHub. So did I.
After some initial problems with the settling in, it works quite well.
GitLab and the integrated CI is very useful to automatically upload your projects to CPAN if all tests are positive.
The steps are quite simple:
1.) Start with some project on gitlab. It doesn’t matter which one.
2.) On gitlab you can configure the some ci settings in your project
It fix the API (yet again) day here in the Moose-Pen
So as we all know I have been playing with the extended operators over the last few posts and I just notices something in my code;
I can enter a mixed case operator like this 'BeETween' and things will still work. This is good but I think I left a part out on the Database::Deriver side of things and in Driver ::DBI I do this;
"A lot has been written about parsing left recursion. Unfortunately, much of it simply adds to the mystery. In this post, I hope to frame the subject clearly and briefly."
How can we use long lists of symbols from an imported package and still keep the code readable?
I usually prefer use statements of the form:
use My::Module qw(symbol1 symbol2 symbol3);
Except for specially understood modules, like Moose and Test::More, I don't like to just import everything. Rather I like to explicitly call out only the specific symbols I need.
But what if you need to:
use My::Module qw(
symbol1 symbol2 symbol3 symbol4 symbol5 etc and so many symbols
that it takes up several lines all the time in every package
that uses it
);
With upcoming version 0.2.0 swat removes usage of prove as internal test runner. There are some -minor- breaking changes due to this. For those who uses swat I would recommend to read GH pages docs and in case you'll need help with migration of your project to the latest swat version don't hesitate to contact me.
Hmm I could just copy and past yesterday's postette here and and in 'NOT' in the correct places to get today's 'Is Not Null' operator postette but I an not going to take the schlock path today.
As I implied it is the turn of the 'Is Not Null' operator today another very easy one for a postette ad I start with the same test as yesterday and just add Not where needed, no need for that here.
As for the Driver::DBI code I could just add in another 'else if' into that _predicate_sql' sub but I think I will take a little different approach and have one 'elsif' that covers both. Here is the patch
If I were to pick the most ubiquitous construct in the Perl 6 programming
language, it'd most definitely be the colonpair. Hash constructors,
named arguments and parameters, adverbs, and regex modifiers—all involve the
colonpair. It's not surprising that with such breadth there would be many
shortcuts when it comes to constructing colonpairs.
Today, we'll learn about all of those! Doing so will have us looking at the simplest as well as some of the more advanced language constructs, so if
parts of this article make you scratch your head, don't worry—you don't
have to learn all of it at once!
PART I: Creation
Colonwhaaaa?
The colonpair gets its name from (usually) being a Pair object constructor
and (usually) having a colon in it. Here are some examples of colonpairs:
Being lazy, I thought to myself, "when using the web interface, why should I need to add my country to the query?". So, using CGI::Lingua which is already available via the VWF system used to build the site, you longer need to do that. From the US, try this:
Just a quick postette on adding in another operator to Driver::DBI. Today I am adding the 'Is Null' operator. First of course a set of tests to add into '32_where_operators.t' along this vain;
The bonus deliverable "Perl 6 Numerics" Language documentation page was
merged to master. It describes all of the available Perl 6 numerics, their
interactions, suitability, and hierarchy.
The newest post on the "Ocean of Awareness" blog is
"Marpa and procedural parsing"
: Marpa's procedural parsing is more flexible and more powerful than recursive descent's.
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