Archive of October, 2021

I love the group by SQL command, and sometimes I really miss these SQL-like functions in languages like JavaScript. In this article I explore how to group arrays into maps and how we can transform those maps into structures that work for us. We will leverage TypeScript generics to do transformation on data structures in such a way that the end-result remains strongly typed: this will make your code more maintainable.

While working in Databricks, I needed to plot some images. I wrote some code that does this in IPython notebooks, but nothing that works on a Dataframe. I decided to change the code a bit, so it works in Databricks. This solution uses PIL and Matplotlib.