TypeScript things I wish I knew earlier

https://alvar.dev/blog/typescript-things-i-wish-i-knew-earlier

I hope everyone's doing well! This week's post ✍
An overview of the type unknown in Typescript https://oliviac.dev/blog/an-overview-of-unknown-typescript

PS.: I never thought I would be able to write more than one or two posts this month, but here we are with the fourth one :)

Unit Testing in JavaScript

Unit tests are also known as component tests.
They take the smallest piece of testable code (in most cases functions) and check if it behaves as expected.

Custom Type Guards in TypeScript

My previous post showed with some short code snippets 5 useful TypeScript ticks. One of those tricks was a User-Defined Type Guard. Since this "trick" has attracted a lot of attention, I decided to write this short post to make this concept easier to understand.

5 useful TypeScript tricks

1. Create a type checking function.
2. Set all properties of an interface to optional.
3. Get the type of the parameters of a function.
4. Use Setters and Getters.
5. Optional chaining.

I just published a blog post that I've been working on for a while:
The Church Encoding of Simple Algebraic Data Types

Church encodings are cool in that they're a really fundamental theoretical construct in the lambda calculus, a practical tool for making TypeScript code more succinct, and the basis for object algebras, a powerful technique for writing extensible code in object-oriented languages. This post just scratches the surface, but I hope that it will be accessible to TypeScript developers who have some familiarity with functional programming techniques.