Programming

Passing a struct as ref through an interface in C#

By Görkem Paçacı | 2022-12-062022-12-07 by Görkem Paçacı

Didn’t think it’d be any complicated. I’m in the middle of a large refactoring job that is primarily concerned with memory adjacency. When data lies in memory continuously instead of being distributed segments, parallel code scales better because of CPU caching. This is currently my problem with the Parallel implementation of CombInduce, the ‘solver’/program synthesiser that forms the basis of our work in Interpretable AI. This memory adjacency work involves, among other things, to replace…

Programming

Bad examples and inheritance

By Görkem Paçacı | 2022-10-242022-12-07 by Görkem Paçacı

The other day my students were asking about Covariance/Contravariance, they were visibly frustrated because they were trying to grasp them at once together with covariance/contravariance modifiers on generics. While trying to explain the concept without generics, I came up with an example on the spot about inheritance that didn’t work, so they were even more frustrated. Because the example not only didn’t make a good case for covariance/contravariance, it didn’t work as an example of…

Programming

JustOnce delegate wrapper

By Görkem Paçacı | 2019-11-202022-12-07 by Görkem Paçacı

I found myself in need of returning a delegate but making sure that the receiver gets to call the delegate at most once. The task at hand is a concurrent task queue. Threads take a task, and can put back a set of tasks back into the queue if they wish. But if they will put back some tasks, TaskQueue needs to make sure they get to do it only once. Simply the thread would…