Plurrrr

The map data-structure is incredibly useful when programming. The first time I used Perl the thing that most impressed me was how easy it was to use hashes, as they call them. I used them for everything! Map is a central feature in Go too — it’s one of the built-in object types with syntax support and generics. I think most people who program in Python have a similar experience. They call them dictionaries, and they are everywhere. In JavaScript, too, every object is a sort of a hash map. When I worked on V8 we had to go to huge lengths to hide the performance consequences of that decision, but I’m still a fan of easy-to-use hash maps in languages.

Compressing files adds an overhead. It takes time to compress the file, and it takes time again to uncompress it. However, it may be many times faster to send over the network a file that is many times smaller. The benefits of compression go down as the network bandwidth increases. Given the large gains we have experienced in the last decade, compression is maybe less important today. Having fast decompression is important.

In iOS 15, we got a new Formatter API. Apple provides a new formatter across the board, numbers, dates, times, and more. Why do we need another formatter? How does it differ from the old one? Let's find out.

What is structured concurrency? Well, long story short, it's a new task-based mechanism that allows developers to perform individual task items in concurrently.