ENTRIES TAGGED "learning"

Formulating Elixir

Simon St. Laurent and Jose Valim explore a new functional programming language

I was delighted to sit down with Jose Valim, the creator of Elixir, earlier this month at Erlang Factory. He and Dave Thomas had just given a brave keynote exploring the barriers that keep people from taking advantage of Erlang’s many superpowers, challenging the audience with reminders that a programming environment must have reach as well as power to change the world.

Elixir itself is a bold effort to bring Erlang’s strengths to a broader group of developers, adding new strengths, notably metaprogramming, along the way.

Watching Elixir grow has been a unique experience for me. I’ve seen other languages (JavaScript and XSLT) emerge, but Elixir combines solid foundations on prior (Erlang) work with a remarkably open conversation about how to structure the language. Jose tries things and asks for feedback, takes suggestions well, and values questions about how best to make the language accessible. Even without a standards organization, the process has remained open, stable, and productive.

Whether you’re interested in Elixir itself or just in the challenges of creating a new combination in a world filled with past experiments, it’s well worth listening to Jose Valim.

  • We’ve had functional programming since 1959 – why the burst of interest now? [2:10]
  • Moving from Ruby to Erlang “making Rails thread-safe, that was my personal pain-point” [3:13]
  • “Every time I got to study more about the VM, the tooling and everything it provides, my mind gets blown.” [6:12]
  • Why Elixir started, and how it’s changed as Jose learned more. [10:08]
  • Integrating new Erlang features (R17 maps) into Elixir. [15:43]
  • When can you use Elixir in production? [18:07]

I’m looking forward to seeing a lot more Elixir, even as I need to catch up on updating Introducing Elixir. I’m not sure it will conquer the world immediately, but it will certainly leave its mark.

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Declare and It Happens

CSS already making Web code more approachable

Last week, I wrote about the need to make programming, at least much programming, more accessible. I was thinking in terms of business processes, so spreadsheets and flow-based programming sprang to mind. Today, though, Jeremy Keith reminds me that on the Web, we already have much of that world in Cascading Style Sheets (CSS).

“Being a programming language” was never a goal for CSS, which pushed the opposite direction in contrast to Netscape’s JavaScript Style Sheets. There are moments, of course, when developers wish otherwise, and the SASS and LESS preprocessors can give them more functionality. As Keith points out, however:

There are a lot of really powerful programmatic concepts that we could add to CSS, all of which would certainly make it a more powerful language. But I think that power would come at an expense.

Right now, CSS is a relatively-straightforward language.

I suspect some readers are scratching their heads, wondering why CSS is even being considered a language, much less why adding programming features to it would be a bad thing. If you think of CSS as a simple object-manipulation language, though, it fits pretty neatly into the sweet spot I described last week.

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So, You Want to Run a Young Coders Class?

Teaching Future Coders

Ever since PyCon 2013, the interest in the Young Coders class has been intensifying. Practically every Python conference since then has asked about doing one, and several have run their own. Classes outside of conferences have sprung up, as well, from one time workshops to after school clubs.

As more classes happen, more people have been asking about running their own. These classes do take quite a bit of effort to set up, but the payoff is enormous. Also, once you do one, doing subsequent ones gets easier and easier.
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Practice Makes Programmers

A few iterations make even functional programming digestible

Programming gets easier and easier as you do more of it. Languages and logic become familiar, in ways that extend from looking up less and less all the way to muscle memory in your typing. The first few iterations in a new language are often difficult, as everything seems odd. Shifting not just to new languages but to new approaches makes practice even more important.

One of my worst features has been that I never liked to practice. I understood rehearsing, working together in a group, but practicing? Exercises, especially for the sake of exercise, were never my thing. That character flaw has hobbled my writing. I can come up with examples for books, focusing tightly on an issue I’m explaining. But then, really? I have to ask readers to go solve a particular (already solved) problem?

I’m not alone in this—too many writers have inflicted that attitude on their readers. Exploring sample code is not the same as writing your own code. Miguel de Icaza points out that:

When you finish a chapter in a modern computing book, there are no exercises to try. When you finish it, your choices are to either take a break by checking some blogs or keep marching in a quest to collect more facts on the next chapter.

During this process, while you amass a bunch of information, at some neurological level, you have not really mastered the subject, nor gained the skills that you wanted.

We can fix this.
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Learning Paths for JavaScript

Cody Lindley on finding your way through a popular and powerful language

Everyone learns and teaches JavaScript their own way, but Cody Lindley (@codylindley) has spent a lot of time with a lot of different kinds of learners. He made the jQuery Cookbook happen, finding and managing contributors as well as making a large contribution himself, and he’s a regular at JavaScript conferences.

O’Reilly recently published his JavaScript Enlightenment and DOM Enlightenment, so it seemed like a good time to talk about how developers find their way through the many choices JavaScript offers.

Highlights include:

  • JavaScript developer? Or front-end engineer? Websites? Or applications? (at 0:52)
  • Don’t be down on jQuery users (at 2:03)
  • JavaScript objects are different, and critical (at 4:07)
  • The varying degrees of genius in JavaScript libraries (at 7:17)
  • Are buffers between your code and browser APIs necessary? (at 9:17)
  • Running browser tests on the DOM (at 11:08)
  • Needing more focused in-depth documentation (at 12:57)

His closing – “we need to do a better job communicating with the bulk of developers out there” – sounded just right to me.

You can view the entire conversation in the following video:

Comments: 3 |

Distributed resilience with functional programming

Steve Vinoski on when to make the leap to functional programming.

Functional programming has a long and distinguished heritage of great work — that was only used by a small group of programmers. In a world dominated by individual computers running single processors, the extra cost of thinking functionally limited its appeal. Lately, as more projects require distributed systems that must always be available, functional programming approaches suddenly look a lot more appealing.

Steve Vinoski, an architect at Basho Technologies, has been working with distributed systems and complex projects for a long time, first as a tentative explorer and then leaping across to Erlang when it seemed right. Seventeen years as a columnist on C, C++, and functional languages have given him a unique viewpoint on how developers and companies are deciding whether and how to take the plunge.

Highlights from our recent interview include:

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