Today I’ll write about the basics of writing asynchronous code in C#. Because it is hard to find and fix bugs in asynchronous or multi-thread code, you ought to know the rules mentioned below to avoid common mistakes.
…In general, I strongly dislike debugging in Visual Studio Code, because it is a pain in the ass to configure for every project from the beginning, besides it sometimes simply doesn’t work.
One of the worst things to debug are unit tests running in Node.js. They run in weird threads, start with complicated frameworks, and often simply don’t hit breakpoints.
The worst so far was AVA.
…Let’s assume we want to retrieve some data from an API and show it together with the original data. For instance, I’ll use the DuckDuckGo API to find capital names for countries.
…I don’t want to create a guide on the declaration files but only share some tips: what is an ambient declaration, what’s specific about ambient namespaces and what is the result of using ambient namespaces.
…Previously, I have created a maze generating code while learning Python. Later I enhanced it with animation and marking special cells. All of it was done in rush, to solve the problem. Now I spent some time improving the quality of the code by encapsulating code into classes, using “private” methods and fields and separating concerns. The exact steps I took can be viewed in the GitHub repository or read here.
…In the previous post, I generated a simple maze. I wasn’t sure the algorithm worked as intended unless I debugged or animated it. I chose the second option. I also added marking the beginning and end of the maze quest.
…There are plenty of maze generation algorithms, some are described here and here. I decided to use one to learn some Python. I chose Recursive Backtracker. You can find longer descriptions in both links, but briefly:
As a quick exercise, I wanted to read all URLs from my page’s sitemap instead of crawling the site. Just after I added a nested callback I decided to apply the Single Responsibility Principle and convert calls to Promises. Later I experimented with async/await and automatic conversion with Node’s promisify. Finally, I rewrote the solution in functional style using Ramda and reactive using RxJS. Read on to follow the evolution of callbacks in JavaScript.
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