Latest Screencasts

Are you testing your JavaScript? Learn how to add specs using Jasmine. This episode also covers jQuery integration with jasmine-jquery.

Test-driven development (TDD) is a programming technique that reverses the usual sequence of coding and testing. By writing tests just in advance of the code needed to satisfy them, programmers: * Work with confidence * Work on a series of achievable steps instead of tackling a big problem all at once * Ensure that software design meets the need of the actual code * Leave behind a suite of tests to help preserve the integrity of the code

Okay, okay, I know that I said we weren’t going to have another string calculator kata, but this one is in Clojure, and I wanted to get it up on the site. It is fun to watch, especially if you compare it to the Scheme one. Tom Crayford has been working on it for a [...]

After being away for a couple weeks due to conferences and sickness, we present another entry in our “Same Kata, Different Languages” series: the String Calculator in Groovy by Itay Maman. This will most likely be the last of the String Calculator katas for a while, as we’ve been doing them for a long time [...]

Uncle Bob walks and talks his way through the Prime Factors Kata. No music, but lots of commentary.

Continuing our series of ‘Same Kata, Different Languages,’ we have a very special performance in Python by Gary Bernhardt: Gary Bernhardt is an independent software contractor in Seattle specializing in the dynamic languages Python and Ruby. A brutal minimalist, he is bent on the destruction of all existing software except Emacs and Vim, the two One True Editors. Gary’s a [...]

Continuing our series of ’same kata, different languages,’ Giordano Scalzo provides us with a great view of the kata in Scala. I’ve fooled around a little bit with Scala, but definitely felt like I was just writing java in a not-quite-different environment. Watching Giordano code was very refreshing. Giordano Scalzo is a Software “jack of all [...]

For our first in the series of ’same kata, multiple languages,’ we have a treat for everyone, Gabriele Lana is doing it in Erlang. Gabriele Lana is a software journeyman living in Milan (Italy). Since 1998 he works as a developer and consultant. In 2000 he started using Agile practices in real time and embedded industries, proving their effectiveness [...]

Roy Osherove and Gil Zilberfeld of TypeMock talked about the katacast series on their podcast, ‘This Week in Testing,’ and called me out to do Roy’s standard TDD practice, String Calculator. There are a few screencasts of this kata in C# linked from his page, which are well-worth watching. It is always interesting seeing the [...]

Here, at long last, is a recording of the Prime Factors Kata in Ruby, done to the tune of the Flower Duet from Lakme’.  This version is much more polished than previous versions, though is still not perfect.  It will take many more weeks of practice to perfect. Many things have changed since the last version.  [...]