Download to read offline
Uploaded byPeter Kofler
Coding Dojo: Asynchronous Clock-In (2016)
Peter Kofler presented an asynchronous coding dojo on building a clock-in application. The goal was to build a client interface that allows punching in and out with optional GPS data, with asynchronous calls to a backend server. Kofler emphasized focusing on doing the coding challenge correctly rather than just getting it done. Participants were instructed to work in pairs, add testing, and start with a simple asynchronous backend mock to practice asynchronous language features like promises.
Coding Dojo: Asynchronous Clock-In (2016)
- 1. Coding Dojo Vienna: (Async)Clock-In-Kata Session 20160920 Peter Kofler, ‘Code Cop’ @codecopkofler www.code-cop.org Copyright Peter Kofler, licensed under CC-BY.
- 2. Peter Kofler • Ph.D.(Appl. Math.) • Professional Software Developer for 15+ years • “fanatic about code quality” • Freelance Code Mentor PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY
- 3. I help developmentteams with PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY ● Professionalism ● Quality and Productivity ● Continuous Improvement
- 4. Mentoring PETER KOFLER, CODE-COP.ORGFANATIC ABOUT CODE QUALITY ● Pair Programming ● Programming Workshops ● Deliberate Practice, e.g. Coding Dojos
- 5.
- 6. Coding Dojo Mindset ● Safeplace outside work ● We are here to learn ● Need to slow down ● Focus on doing it right ● Collaborative Game PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY
- 7. Assignment PETER KOFLER, CODE-COP.ORGFANATIC ABOUT CODE QUALITY
- 8. Clock-In-Kata ● Build a clientinterface for time tracking. ● The time punch (data) is sent to back end. ● It accepts optional GPS positions. ● Call to server back end is asynchronous. ● Collecting GPS data is asynchronous, too. ● Asking user for GPS permission is even more asynchronous. (optional) PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY https://github.com/wolframkriesing/clock-in-kata
- 9.
- 10. Focus on “Asynchronous” PETERKOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY
- 11. Async Language Features ● Futures/ Promises ● Chaining promises returns new promise. ● Future#then (Dart) ● Promise#then (EcmaScript 6) ● CompletableFuture#then* (Java 8) ● async await reserved words (Dart, C#) ● Short cuts to Future API PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY
- 12. How to Start ● Finda pair. ● Create new project. ● Add a testing framework. ● Start with Case A) ● Mock the asynchronous backend call. ● Keep the async code clear and readable. ● What is executed sequential/parallel? PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY
- 13. Don't Focus on Gettingit Done. F0cus on Doing It Perfectly.
- 14.
- 15. Closing Circle ● What didyou learn today? ● What surprised you today? ● What will you do differently in the future? PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY
- 16. Peter Kofler @codecopkofler www.code-cop.org Kata by WolframKriesing @wolframkriesing https://github.com/wolframkriesing/clock-in-kata PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY
- 17. CC Images ● Bruce http://www.flickr.com/photos/sherpas428/4350620602/ ● pairinghttp://www.flickr.com/photos/dav/94735395/ ● dojo http://www.flickr.com/photos/49715404@N00/3267627038/ ● time punches https://www.flickr.com/photos/qchristopher/3057895390/ ● async https://www.flickr.com/photos/ilo_oli/187670793/ ● wants you http://www.flickr.com/photos/shutter/105497713/ PETER KOFLER, CODE-COP.ORG FANATIC ABOUT CODE QUALITY