Monthly Archives: March 2015

We rushed along and accumulated some technical dept in our test suite. For the next feature I intend to implement, this is going to hurt us! So first thing to do is clean up the tests. ► All Game of Life Episodes: http://goo.gl/xc59GX ► Let’s Develop! http://letsdeveloper.com ► Don’t Miss […]

Conway’s Game of Life #14 – Game Loop – Test ...

30 Mar, 2015 in Conway's Game of Life / Let's Develop tagged Game Development / TDD by letsdeveloper

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In the beginning of this year, I decided to organize a code retreat. A little later Simone Bächle pointed me at jbrains’ lovely example of a messed up trivia-game implementation and the idea of a Legacy Code Retreat. I quickly decided to give the concept a try and that’s how […]

1st Darmstädter Legacy Code Retreat

29 Mar, 2015 in Events tagged Legacy Code / Report / Retreat by letsdeveloper

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Did you know you can access GitHub via SVN? While preparing my 1st Legacy Code Retreat, I was looking for a way to checkout a subfolder of a GitHub repository, when I stumbled across a post on StackOverflow. For example, I can checkout only the “src” folder of my “foo” […]

Checkout Parts of GitHub Repositories Using SVN

29 Mar, 2015 in Usefull Stuff tagged GitHub / Source Control / StackOverflow / SVN by letsdeveloper

Let’s make our game loop interactive! Without user input any game is boring, right? So we need respective handling in the loop. Int his episode I’m test-driving it into our code. ► All Game of Life Episodes: http://goo.gl/xc59GX ► Let’s Develop! http://letsdeveloper.com ► Don’t Miss an Episode: http://goo.gl/whzDi1 ► Test-Driving […]

Conway’s Game of Life #13 – Game Loop – Input

27 Mar, 2015 in Conway's Game of Life / Let's Develop tagged Game Development / TDD by letsdeveloper

My core implementation in place and tidied up, I start adding the next features: Using Java 8 streams, extending the delimiter syntax is quite easy. This concludes the kata. Nice challenge to get to know Java 8 streams! Try it for yourself. ► All Kata Episodes: http://goo.gl/xicl9c ► Let’s Develop! […]

String Calculator Kata 04 – More Delimiters w Java 8 ...

7 Mar, 2015 in Code Kata / Let's Develop / String Calculator tagged Java 8 / Java Streams / TDD by letsdeveloper

Next requirement is to check for exceptional cases an throw. I use JUnits ExpectedException Rule to test exceptions and their message. I use more Java8 Streams features to check for the exceptional cases and to build the exception message. As always, I clean up after myself. ► All Kata Episodes: […]

String Calculator Kata 03 – Testing Exceptions (JUnit) & Streams ...

7 Mar, 2015 in Code Kata / Let's Develop / String Calculator tagged Java 8 / Java Streams / JUnit / TDD by letsdeveloper

Next task in the kata is to allow arbitrary delimiters in our sequence of numbers. Delimiters are specified by an (optional) prefix in the string. Hence, we need some logic to split and interpret both parts. First, I get it to work, then, I refactor to clean up. ► All […]

String Calculator Kata 02 – Specify Delimiters

7 Mar, 2015 in Code Kata / Let's Develop / String Calculator tagged Java 8 / Java Streams / TDD by letsdeveloper

This kata is about parsing a sequence of numbers from a string and adding them up. I focus on Java 8 streams in the implementation, to explore this particular language feature. In this first episode, I get the basic functionality to run. Test-driven, of course. ► All Kata Episodes: http://goo.gl/xicl9c […]

String Calculator Kata 01 – IntStream

7 Mar, 2015 in Code Kata / Let's Develop / String Calculator tagged Java 8 / Java Streams / TDD by letsdeveloper

Third step: We want the loop to render the game. This has to happen after the update, otherwise the game might lag. Order is easy to ensure with handcrafted stubs! ► All Game of Life Episodes: http://goo.gl/xc59GX ► Let’s Develop! http://letsdeveloper.com ► Don’t Miss an Episode: http://goo.gl/whzDi1 ► Test-Driving the […]

Conway’s Game of Life #12 – Game Loop – Render

2 Mar, 2015 in Conway's Game of Life / Let's Develop tagged Game Development / TDD by letsdeveloper