String Calculator

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