Do(n't) Use This Code—Expert Training & Consulting on Twitter: "#AdventOfCode Day #11, Parts #1 & #2 Summary: · straightforward with NumPy (e.g., `collections.Counter` → `numpy.unique`; `set` → masking tricks) · use generator
![Understand NumPy Subset-Selection and Matrix-Level Arithmetic Operations | by Rahul Kotecha | Python in Plain English Understand NumPy Subset-Selection and Matrix-Level Arithmetic Operations | by Rahul Kotecha | Python in Plain English](https://miro.medium.com/max/1106/1*Cbf4wUIOVbKFULgyUhNW8g.png)
Understand NumPy Subset-Selection and Matrix-Level Arithmetic Operations | by Rahul Kotecha | Python in Plain English
![How to Create a Block Tridiagonal Matrix using NumPy in Python (ft. personal trauma variables) – Thauwa How to Create a Block Tridiagonal Matrix using NumPy in Python (ft. personal trauma variables) – Thauwa](http://thauwa.me/wp-content/uploads/2021/12/Tridiagonal_Matrix.png)