There are already a few blog posts around (e.g.
SAP Hana and r — the way of the widget), which mention that it's possible and, in fact, quite easy to connect to SAP HANA from Perl code using ODBC DBI drivers. As I'm planning to give a bit more specialized talk at this year's YAPC in Granada I thought it would be useful to describe the setup in detail and provide some references. In the follow-up posts I'll draw more on the topic of my upcoming talk: how ad-hoc OLAP DBs can be conjured with Yertl. BTW, I should probably add "yet another" to the prefix to the title of my blog post, to follow the widely accepted manner of affirming the prevalence of already existing ideas ;)
Back when I was first learning Perl, I'd been doing Unix system administration for a couple years, and one command I ran a lot was this one:
ps auxww | grep something
(On some systems it was 'ps -ef'.) That would get a full listing of all running processes and grep them for "something." I soon got tired of typing all that, so I made a shell alias:
alias pst='ps auxww | grep '
Then I could just run
pst something, so it saved typing. But it still wasn't great. It left out
ps's header line that showed what all the columns were, and they'd vary from one OS to another, so it wasn't always easy to tell from the data. Also, the
grep process itself would show up in the list, which was annoying. (I already knew it was running, because I ran it.) So one of the first Perl scripts I wrote was this one, which I've been using ever since because it worked, even though the code is embarrassingly bad now:
I had a little hiccup while installing Perl 6 on a CentOS system, and thought I'd leave the details here in case it happens to anyone else.
[Update: This has already been fixed by one of the Perl 6 devs, who isn't able to login here to comment. Panda installs without needing lsb_release. So my kludge is no longer needed.]
I used rakudobrew, and installed rakudo with moar just fine. But
"rakudobrew build-panda" failed with
"Unable to execute 'lsb_release -a 2> /dev/null'". That
lsb_release program wasn't installed on this system, but yum said I could get it from the package redhat-lsb-core. Unfortunately, when I tried to install that, it came up with a list of dozens of dependencies to go with it, including a lot of X stuff like ghostscript and libGL, even some sound packages.
Let’s say you work on a team that runs a web content management system for various different customers. It is hosted at
ourcms.com, but each customer’s public content is published on a different domain, which is determined by a setting in the interface, which they can change at will. When a customer is logged into
ourcms.com they see links to their public content in various places, and some of the public content has “edit this”-type links back into
ourcms.com. All of this runs as a single PSGI application. A not unfamiliar scenario, presumably.
How do you spin up a development server where you can test this?
For my first experiments with heroku I decided to adapt an existing Catalyst application…
Stuart Cooper gave a talk at this last month's Sydney PM meeting. His talk was "analog" in that he gave it without slides from hand written notes with the purpose of provoking a guided discussion. The outcome was rather successful with people offering thoughts and experiences, along with references to websites and books. It was very productive and enjoyable.
He typed up and published his notes on the Sydney.PM emai llist, which are posted below with hyperlinks added for reference.
Talk by Stuart Cooper for Sydney.pm meeting, July 2015
1) Perl advocacy?
Not advocacy - evangelism - spread the word.
In the early 1990s Linux had some powerful Evangelists;
Linus himself, Jon 'Maddog' Hall etc and even one of the
world's top supermodels - Linux Evangelista.
Your target audience for your evangelism is your Linux-using co-workers.
They might be Ruby guys, DevOps guys, sysadmins, Java programmers,
any group of intelligent Linux users.
blogs.perl.org is a common blogging platform for the Perl community. Written in Perl and offering the modern features you’ve come to expect in blog platforms, the site is hosted by Dave Cross and Aaron Crane, with a design donated by Six Apart, Ltd.