Friday links 207

1. Covariance and Contravariance FAQ – The C# Team – Site Home – MSDN Blogs
2. CQRS
3.  Clean Coder Blog
4. For 1st time, MIT’s free online classes can lead to degree – SFGate
5.  D3.js – Data-Driven Documents
6. Specification-based Test Design Techniques for Enhancing Unit Tests – CodeProject
7. (1) On This Day
8. 10 Common Mistakes Parents Today Make (Me Included) | Kari Kubiszyn Kampakis
9. Build Awesome Data Visualizations in Microsoft Power BI
10. Microsoft taps open source LLVM compiler for cross-platform .Net | InfoWorld
11. Bridge.NET Live C# to JavaScript Compiler
12. 9 bad programming habits we secretly love | InfoWorld
13. 78 Things I’ve Learned in 9 Years of Agile Coaching | Rally Software Blog
14. Building Android Apps with C# (Intro to Xamarin.Forms) – CodeProject
15. Seven life lessons at 40 — Medium
16. Star Wars: but instead of normal, it’s with philosophers – Existential Comics