Digital Digressions by Stuart Sierra
From programming to everything else
Update Feb. 10, 2010: I was wrong. Recent discussions indicate that placing optional arguments in-line, as in my first example, is preferred. In the future, Clojure may have destructuring support for this style. For now, this post remains a useful guide to map destructuring. Many languages, such as Python and Ruby, allow functions arguments to…
I’ve made a new version of my clojure-hadoop library. Downloads are on the main page. List of changes here. This fixes some missing pieces in the first release, and adds some more Hadoop configuration options.
At long last, I have made a formal release of my clojure-hadoop library. Downloads and more information here. The 1.0.0 release is documented, but not in exhaustive detail. Other people have used this successfully, but it may not support all possible Hadoop configurations. Watch video of my presentation at HadoopWorld NYC.
The title of this post would make a good name for a band. Anyway, today I’m going to talk about Swing and concurrency and Clojure. The Swing framework is not thread-safe. That may sound strange at first, but there’s actually some sound technical reasoning behind it. Basically, the Swing designers realized that, in order to…
Most Swing examples don’t translate well into Clojure because they are so thoroughly embedded in the object-oriented paradigm. A typical Swing example has a main class that extends a container class and implements some *Listener interface. Clojure beginners who try to port these examples may think they need to mimic that same structure. In fact,…
GUI layout is hard. You’d be crazy to do it without a GUI designer like Netbeans. Well, I’m pretty crazy. So I’m going to do some GUI layout in Clojure. And I’m going to use the most intimidating of Java’s GUI layout classes, the GridBagLayout. Conceptually, GridBagLayout is pretty straightforward. It places components on a…
One of the great things about Clojure is how it can make Java programming easier and less verbose. Take Swing. It takes a ton of code to render even a simple GUI. Most tutorials don’t even tackle it without an IDE like NetBeans. But we’ve got something Java lacks: macros! In this post, I’ll build…
My previous post left you with a Clojure/Swing GUI consisting of one window and one button. Boring! Let’s make it do something. To catch up, start a Clojure REPL and type: (import ‘(javax.swing JFrame JPanel JButton)) (def button (JButton. “Click Me!”)) (def panel (doto (JPanel.) (.add button))) (def frame (doto (JFrame. “Hello Frame”) (.setSize 200…
Swing is the GUI standard for Java. Clojure is the awesomeness standard for Java. Let’s make an awesome GUI. Make a Window Interactive development is fun. Fire up a Clojure REPL, and type this: (import ‘javax.swing.JFrame) (def frame (JFrame. “Hello Frame”)) (.setSize frame 200 200) (.setVisible frame true) Hey Presto, there’s a window! (It might…