What programming language should I learn?

May 20th, 2011, 11:56 am PST by Greg

I recently had a former CMPT 165 student email me and ask essentially if Python was the best language to learn [first] from a practical/employment standpoint. This was my response, that I think was good and would like to expand on here:

Certainly the traditional view of the world is “C/C++/Java for big projects or where speed matters; higher-level languages like Python/Perl/VB for smaller projects or automation.” Certainly many of my colleagues continue to see the world in this way.

The programming language world has changed in some subtle ways in the last few years and I don’t think that attitude is really valid anymore. If I was starting a big project today (like writing a word processor or something), I would probably start with Python (or something similar): it’s easier to write and get things done and it’s possible to bridge to code in Java or C if you need to.

If I had to honestly summarize the world today, I’d say “C++/Java/C# for big companies who want to make a ‘safe’ choice of programming language; Python/Ruby/JavaScript/Scala/etc on smaller projects where the developers make the choice and want to get things done and enjoy their lives.”

A few footnotes on that: (1) the result is there are probably more Java/C# jobs in the world than other languages; (2) the Python/Ruby/Javascript jobs tend to be in smaller companies and are probably more fun; (3) after you learn to program, learning a new language isn’t nearly as big a deal as learning your first–most of the concepts are always the same.

By “the programming language world has changed in some subtle ways”, I mean mostly:

  1. Languages we always though of as “slow” have been made shockingly fast by just-in-time compilers like V8 and PyPy.
  2. Mixing languages in a project (e.g. calling C from Python, or using one language’s standard library from another) seems, to me at least, to be an easier and more mainstream thing to do if you need to.
  3. Frameworks/libraries are used much more heavily. If you spend 90% of your time calling some GUI library, the speed of your code doesn’t matter much: the speed of the GUI library is what matters. (And, who’s to say the library is written in the same language you’re writing? See 2.)
  4. C isn’t the “fast” language anymore. That’s probably more controversial, but basically, C is really good at single-threaded performance, but multithreading and heterogeneous processor environments are a real pain. Today’s reality is that new processors aren’t improving single-treaded speed by very much. Those who want their computation to happen really, really fast seem to be increasingly reaching for computation-specialized tools like Go, OpenCL, or Hadoop. It turns out that the explicitness of C starts to become a burden if you have to smack the mutexes around by hand.

My assertion that “C++/Java/C# for big companies who want to make a ‘safe’ choice” is really just a gut feeling. I understand and even agree with the desire for static typing in a huge project, but I honestly don’t think that’s why companies choose Java or C#. Companies choose these language because they are enterprisey: they are the kind of language that checks all of the CIO’s boxes and have comforting professional certifications that the HR department can look for.

Also, big companies probably think Oracle’s ownership of Java is a good thing. They haven’t reached the conclusion that I (and I suspect many others have): Oracle will slowly strangle the life out of Java until it truly becomes the new Cobol.

So where does that leave us?

You might as well look for a language that’s (1) fun to write, and (2) easy to actually get shit done with. For me that’s Python, but I can certainly accept Ruby, Lua, Scheme, and friends. I could accept PHP and VB (if I had enough drinks in me) or even C# and Java (if you had an explanation grounded in the language design/features and didn’t contain the words “enterprise” or “corporate”).

Wackiest spam ever

May 11th, 2011, 11:19 pm PST by Greg

So I got this random email reporting a broken link on my CMPT 470 web site. It’s a little unusual to get an email like that from someone who was apparently not a student, but not totally crazy.

From: angela.hill88@gmail.com
Subject: Found a broken link on your page

Hey Greg,

I found a broken link on
[web page on my course site] and since I
was researching computer science and needed the page, I found an updated
article online. 

The broken link to "Howto for Python" is
[the once-working link] and I found an article on the front
page of [some not-totally-related web site] if you wanted to fix it.
Click the tab "Beginner Python Tutorials" to get to the article.

Figure I'd send you an email because others may need that link for the same
reasons!

Thanks!

Angela Hill
angela.hill88@gmail.com

I googled the sender, and found this essentially-identical broken link report with the same “correct” URL. There are a few other examples a Google away. It’s freakin’ link spam!

If anybody really wants to find the target page (that I’m not going to link to prevent bumping their pagerank for any reason), it’s “onlinecomputersciencedegree” with a “www” and a “com”. The site itself is entirely content-free: all external links to other pages.

Somebody’s plan must be:

  1. Crawl tech link pages.
  2. Link-checking all of their links. (The examples I have are actually broken links.)
  3. Finding the creator’s email and first name on the page. (or accessible somewhere else nearby?)
  4. Emailing that address with the spam link come-on.
  5. Hoping they blindly link to your site without noticing that it’s entirely worthless.
  6. Profit?

How is this possibly a thing? Am I missing something?

Elections, ugh

May 2nd, 2011, 11:17 pm PST by Greg

So here I am in a hotel room in San Francisco, concerned primarily with an election in the homeland. We seem to be looking at a conservative majority and NDP opposition. Here’s my thoughts on how we got here…

I feel like the republicans in the states are mostly to blame for the NDP gains: there has been a lot off talk there about how health care and generally governments doing… things… is evil socialism. I think a lot of Canadians looked at that and said to themselves “that seems okay…we need us some socialism.”

As for the conservative gains? Here’s my glass-half-full take on that: three reason Harper is so popular is that he has been in a minority government and hasn’t actually been able too *do* anything. Given a few years of Harper being Harper, I don’t think the poll numbers will be quite the same.

As for the liberals… well… you picked Igatieff all by yourself.