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Its actually do something day here in the Moose-Pen

So yesterday I left off with my Driver::DBI generating this SQL code;

INSERT INTO user (address,username) VALUES(?,?) 

now I actually have to get that to run against a DB. I have the first DBI part done the prepare and it works

Do not ask what Perl can do for you, ask what you can do for Perl!

In my effort to bring the new signature back to older versions of Perl, I'm maintaining Filter::signatures, a source filter that simply converts the signatures to the equivalent old-style Perl code. That filter works surprisingly well for its simplicity and has caused very little in problems.

This is the third article in a series on CPAN distribution metadata. The first article was a general introduction, and the second article looked at dependencies, and in particular the different phases that you can specify dependencies for (configure, build, runtime, test, and develop). In this article, we'll cover the different types of dependencies and how you combine these with the phases (described in the previous article) to specify the dependencies (or prereqs) for your CPAN distribution.

This article is brought to you by MaxMind, a gold Sponsor for this year's Toolchain Summit, being held next month (May) in Lyon, France. The summit is only possible with the support of our sponsors.

Hello all,
In my first blog post I've announced AI::MXNet, Perl interface to the MXNet machine learning library.
The eight weeks that passed after that were quite fruitful, I've ported whole python's test suite, fixed multiple bugs, added docs, examples, high level RNN interface, Perl API docs has been added to the official MXNet website.
This time I'd like to review in detail three examples from the examples directory.
First one is a simple calculator, a fully connected net that is structured to learn four basic arithmetic operators: addition, subtraction, multiplication and division.
Second example is a comparison of two different approaches to the task of classification of handwritten digits, and the third one is an example of LSTM RNN network trained to generate Shakespeare like text.

Here is the image (generated by Graphviz ) of the calculator network.

The data input is two numbers, that are being routed via two paths; first path is turning the input values into natural logarithms and feeds these into one neuron sized fully connected layer.

Finanlly a DBI codeing day here in the Moose-Pen

So after yesterday's little review I finally got to do some coding on Driver::DBI and the first thing I got working was my '00_load.t' test case. All I needed to do with the present sate of the code is add in;

my $in_hash = { 
++                           da_compose_only=>1,
                view => { name  => 'name' }};
 

to that test case and the error I was getting from DBI;

BD::ExampleP::db prepare failed: Syntax error in select statement ("1") at 
 

went away. Now the error was caused by this sub in Driver::DBI

Two Blocks with the Same Name

In January this year, I got Jemplate in the CPAN Pull Request Challenge. The module implements Template::Toolkit in JavaScript, so you can transfer the burden to process the templates from the server to the client.

One of the open issues in its GitHub repository caught my attention: Jemplate compiled all the templates coming from different files into one large JavaScript code-block. If you declared two blocks with the same name in two different files, they’d end up in the same hash in JavaScript, and only one would survive—but you couldn’t tell which one. Keeping block names unique across files probably isn’t part of common practice, so making the module warn you in such a case sounded like a reasonable requirement.

The Perl Conference this year is going to be in the DC-Metro area, specifically in Alexandria, VA at the United States Patent Office. We've got some great talks lined up and are continuing to update the schedule at http://www.perlconference.us/tpc-2017-dc/schedule.

Register and reserve your spot to listen to speakers like Damian Conway, Mark Jason Dominus and Sawyer X to name a few. You can purchase tickets for our event and/or the tutorial sessions here.

The local PM groups (DC and Baltimore) are really excited about hosting this year's Perl Conference. I hope to see you there.

Dawn

Registered for YAPC The Perl Conference 2017. Travel and accommodations arranged!

Excitement level: 3/5 and rising.

Just another quire review here at the Moose-Pen

Yesterday I summed up what I was up to over the past month or so since I left the Dist-Pen, So tadoy as I am rather sort on time I will just do a quick post-ette on the state of Database::Accessor::Driver::DBI.

Well just for kicks before I revisited any of the Driver::DBI code I re-ran the the very limited test suite of two test case and got a full fail, so I guess every thing is broken.

Looking at the code the first think I noticed was that I have this sub

sub _warn {
my $self = shift;
my ($message) = @_;
warn("Database::Accessor::Driver::DBI: $message ");
}

Which I was using to key of this DA flag 'da_warning' now what I think I will do is hop back to 'Database::Accessor::Roles::Driver' and add this in

I don't mind working with Spreadsheets. Much of my work consists of creating Spreadsheets from SQL queries. Sometimes, the resulting spreadsheet should be a pivot table, listing some values across the spreadsheet. For most of my Spreadsheet-generation needs, Querylet is sufficient, but it cannot create pivot tables.

Alan Kay:

A few principles:

This document is the April, 2017 progress report for TPF Standardization, Test Coverage, and Documentation of Perl 6 I/O Routines grant

Timing

As proposed to and approved by the Grant Manager, I've extended the due date for this grant by 1 extra month, in exchange for doing some extra optimization work on IO routines at no extra cost. The new completion date is May 22nd; right after the next Rakudo compiler release.

Communications

I've created and published three notices as part of this grant, informing the users on what is changing and how to best upgrade their code, where needed:

• Upgrade Information for Changes Due to IO Grant Work
• PART 2: Upgrade Information for Changes Due to IO Grant Work
• PART 3: Information on Changes Due to IO Grant Work

IO Action Plan Progress

Most of the IO Action Plan has been implemented and got shipped in Rakudo's 2017.04.2 release. The remaining items are:

It is cheap clip show day here in the Moose-Pen

Now that I am finally finished with Database::Accessor for the moment as since my last post all my tests are passing, I think it is time for a quick recap of what when on since this post when I left the Dist-Pen and started up the Moose-Pen.

The first few post I set out on writing my first Driver::DAD, I worked out some name-space issues and finally came up with Database::Accessor::Driver::DBI rather than SQL as most DBI drivers run on SQL is just seemed locgial.

The second set of posts I started to write up my Driver::DBI and ran into the problem very quickly that I needed some sort of DBI DB present on the current box to do any testing. I solved this as 'DBD::DBM::db' comes with DBI so I decided to use that for my testing. I even got one or two test cases written and a little code done.

Hey everyone,

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

Enjoy!

I recently added some functionality for random number generation to my modules, which led me on a digression about rand(). This is a short look at some modules for getting random floating point values. A later one will look at random ints and bytes.

Modules for rand()

Module Algorithm	Stat Quality	Interval	Bits in output	Auto Seed	Predictable	Speed
CORE::rand drand48	Bad	[0,1)	48	OK	Yes	29000 k/s
Math::Random::MTwist MT XS	OK	[0,1)	53	OK	Yes	14000 k/s
ntheory ChaCha20 XS	Good	[0,1)	53-113	Full	No	12000 k/s
Math::Prime::Util::GMP ISAAC XS	Good	[0,1)	53-64	Good	No	14000 k/s
Crypt::PRNG Fortuna XS	Good	[0,1)	53	Good	No	700 k/s
Math::Random::MT::Auto MT XS	OK	[0,1)	52	Full	Yes	5000 k/s
Math::Random::MT MT XS	OK	[0,1)	32	rand()	Yes	2200 k/s
Math::Random::Secure Math::Random::ISAAC	Good	[0,1)	32	Full	No	460 k/s
Math::Random::ISAAC ISAAC XS or PP	Good	[0,1]	32	None	No	5700 k/s 480 k/s
Math::Random::Xorshift Xorshift XS	OK	[0,1]	32	Time	Yes	16000 k/s

Just cleaning up the Moose-Pen today.

I left off from yesterdays post with few more tests to clean up and a new one or two to write up. Might as well get the low hanging fruit first and that is this error;

Can't locate object method "dynamic_conditions" via package "Database::Accessor::Driver::Test" at 43_dynamic_conditions.t line 54.
     

and the change was a very easy removal of that 'dynamic_' from the test;

Test::Database::Accessor::Utils::deep_predicate(
    $in_hash->{conditions},     $da->dynamic_conditions(),
--    $dad->dynamic)conditions(), 'dynamic conditions'
++    $dad->conditions(), 'dynamic conditions'
);
     

The Perl Toolchain Summit (PTS) is the annual event where we assemble the people who are actively working on the Perl toolchain, and give them 4 days to work together. In this blog post, we'll look at how we decide what everyone will work on, and give you a chance to make suggestions.

This blog post is brought to you by Perl Jobs by Perl Careers, which as well as helping Perl programmers find jobs, supports a number of community events, including the QA Hackathon last year.

Autoload can be a very powerful tool in Perl, though often you should first consider if there's a better way; Autoload is not necessarily the best solution for cases where you just need to generate many methods by name, and definitely is not the best solution for "wrapping" static methods. But if your use-case does necessitate methods created on the fly, I have released Autoload::AUTOCAN to make this easier to get right.

With the upcoming 5.26 release series of Perl, there's a breaking change that's part of the release. The current directory, '.', is being removed from @INC. It's a good thing, it deals with a bunch of potential security problems and has been discussed more thoroughly elsewhere http://www.nntp.perl.org/group/perl.perl5.porters/2017/03/msg243763.html and http://www.nntp.perl.org/group/perl.perl5.porters/2017/03/msg243722.html

This means that a number of common patterns in many perl scripts, particularly tests, no longer work the way that they did in the past.