April 14th, 2008 | Published in commentary, conferences, erlang, review | 8 Comments | Bookmark on Pinboard.in

I finally got around to watching and listening to Bob Ippolito‘s “Exploring Erlang” video, and I don’t know of any more thorough hour-long introduction to the language than this one. If you’re interested in Erlang but are too busy or too lazy to read Joe Armstrong’s great book or any of the many papers and articles that describe Erlang, then Bob’s talk is for you.

A few interesting points for me:

In a few places Bob mentions that while he finds Erlang syntax unusual it’s really no big deal, and you quickly get used to it. I can verify that he’s absolutely right. A lot of people seem to get really hung up on this issue; if you’re one of them, all I can say is that your concerns are very greatly exaggerated.

Along the lines of the previous point, one of the questions Bob takes after his presentation is from a gentleman who says that his technical lead refuses to use Erlang — in a telephony application, no less — and that his tech lead rolled his own stuff for concurrency and interprocess communication. Hmm, I wonder if that technical leader’s initials are “N.I.H.” It would be interesting to see how well his solution could hold up in the environments in which Erlang has already well proven itself. Given all the attempts I’ve seen over my career at solving such things, many of them made by people who mistakenly think it’s not that difficult to get right, my guess is “not that well.”

Bob mentioned that he finds Erlang to be a very small and thus easily learnable language. He’s absolutely right about that, too; I wish I could count the number of times I’ve said the exact same thing in conversation, in presentations, and in writing. Many people who come from Java or C++ or other general-purpose languages assume that languages need to be huge to be useful, so they assume that small languages must be toys, and they also assume any “real” language requires years to learn. How incredibly wrong they are.

Bob keeps the whole discussion grounded by explaining how Erlang saves him and his team time and money. In case it’s not clear, he’s talking about actual time and actual money. He explains that he can serve millions of web requests per day from just a single machine (though he naturally uses more than one for redundancy and reliability), for example, and by mentioning the small size of his team — I think he said 8? — he hints at the productivity that Erlang affords. My experiences are, again, quite similar.

Coincidentally I also watched Jim Weirich‘s “Shaving with Occam” presentation from the MountainWest RubyConf 2008 held at the end of March, and was pleasantly surprised to find that he devoted a good portion of his talk to Erlang. He mentioned how it was like Lisp in the sense that it has a small core, simple rules for manipulating that core, and powerful abstractions for building new things from the simple rules and small core. Yet, I shouldn’t be surprised. I don’t know Jim at all, but judging from the dates he mentions in his talk I think his career spans around 30 years. It’s also pretty clear that he’s had broad and deep experience with many technologies during that time. From what I’ve seen, people like Jim who have an incredibly deep first-hand understanding of the utility and importance of simplicity, brevity, and powerful abstractions in software development seem to have no problem whatsoever quickly seeing and comprehending the immense value of Erlang.

You’re still not exploring Erlang? What are you waiting for?