On: For RoR, see every method call, parameter and return value in production

[yen223]

I can see this being useful in strongly-typed languages too. There is a massive class of logical bugs that will type-check correctly, that will still result in wrong results being returned.

[jaggederest → yen223]

I built a toy raytracer in Haskell for fun. I found all of these bugs. It turns out that when you implement dot product slightly wrong, the image output is very confusing.