Recently I needed to write a pretty simple function: given a sequence of (name, value) pairs, return a sequence of (name, some collection of all the values having that name) pairs. Here is a simple...

Following-up on the previous post about iterators, say we have a clean Scala API with Option instead: class Foo { def parent: Option[Foo] = … } def findBar(foo: Foo) = Option[Bar] = … It turns ...

There is a common programming pattern where you navigate a hierarchy in order to find an element satisfying a certain condition. I have written code like this in Java probably a million times: cla...

I found myself recently looking at the following code which I wrote when I was getting started with Scala: def getModelState(modelPrefixedId: String) = modelStates.get(modelPrefixedId) match { ...

In Java, you often write things like this, which are rather verbose: URLEncoder.encode(...) URLDecoder.decode(...) Since Java 1.5 you can use static imports, but then you are stuck with the orig...

If you have done some Scala for a while, you know about pattern matching and match/case. Things like: value match { case Some(value) => … case None => … } But there is another use of t...

With @avernet we have been thinking lately about continuations, for a few reasons: Continuations pop up on the web as a concept that could help with event-based programming Scala has a contin...

I just used a Nexus One for 48 hours (thanks Pierre). Here are a few quick notes/thoughts from the perspective of an iPhone 3G user.Getting started <ul><li>Take the SIM card out of the...

Mike Arrington has just posted his 2009 list of products he can’t live without. After my own 2008 list, here is my update for 2009 as I think it’s fun to observe how our computing environment evolv...

A few days ago I upgraded my MacBook Pro’s hard drive after realizing 320 GB drives sell for USD 110 - which made constantly worrying about disk space ridiculous. This also should extend my old MBP...