Pragmatic Maciej articles - 57 total
Helper - the architecture whole
Helper, this word starts my list of the most hated dev words. I am experienced developer who work...
Return statement is ok
Hey, long time no see. I have a new fancy subject, very much related to the code style, so the...
Follow the type
TypeScript has been around for a while, in many new projects it started to be a standard, even old...
Know too much
Single responsibility principle is stating that given program, procedure or function should be...
Hide the constant, abstract the code
We like to use constants, put them in some shared files and use them everywhere. Although, it happens...
The lonely constant
All software projects have differences, but there are also things which never change, and one of them...
The state you've never needed
Every application has a state. State represents our application data and changes over time. Wikipedia...
Advanced TypeScript Exercises - Answer 10
I've asked how to make different & operation by custom Merge type level function. Note - if you...
Advanced TypeScript Exercises - Question 10
Intersection type level operator & has changed in the last versions of TypeScript. The current be...
Grow up
Strong opinions about not important things, this is what developers community likes. Tabs vs spaces,...
Advanced TypeScript Exercises - Answer 9
Hi folks. It was a while, sorry for such a big delay between next challenges. But here we are again 😁...
Mutation is ok
The phrase - "mutation" started to have almost negative connotation in our programming community. It'...
A pinch of magic🧙♂️
The word "function" in programming has two meanings. In one meaning function is just a sub-program, p...
What really is programming?
We have again tech discussion over what is, and what is not programming. Twitter is in fire about HTM...
Switch is ok
Switch statement had lately some bad fame, some developers avoid it as possible, and others advocate...
Maybe just Nullable?
Problem of optional value, it's not a trivial one, and for sure not a young one. You probably have re...
Advanced TypeScript Exercises - Question 9
Short but very interesting question ahead of you. Write a type which will represent not empty array N...
Advanced TypeScript Exercises - Answer 8
The question was about creating indexed type assignable to string. For the full question please visit...
Advanced TypeScript Exercises - Question 8
Welcome back! Let's go back on track after bonus questions. This question will be less abstract, and...
TypeScript Exercises Bonus🦠 - Answers Part 2
For details of the questions and requirements please visit the questions. This post will include only...
Tuples are ok
There are opinions in the community that Tuple types should not be used ever. There are movements als...
TypeScript Exercises Bonus🦠 - Answers Part 1
For details of questions and requirements please visit the questions. This post will include only ans...
TypeScript Exercises Bonus🦠 - Type of Pandemia
We are where we are, in the middle of pandemia, this sadly 😢 is the subject number one which will imp...
Advanced TypeScript Exercises - Answer 7
The question was about exclusive behavior of the type. The core thing is to understand is the never t...
Advanced TypeScript Exercises - Question 7
Today's question will be about creating exclusiveness behavior of the type. TypeScript is structurall...
This is why TypeScript restricts + operator
The source of motivation Lately I found myself in Twitter discussion when there was an arg...
Advanced TypeScript Exercises - Answer 6
6.1 Naive version (lower difficulty) type NaiveFlat<T extends any[]> = { [K in k...
No, TypeScript is not OOP version of JavaScript
The common misconception about TypeScript I hear a lot is - TypeScript is more OOP than JavaScript, T...
Advanced TypeScript Exercises - Question 6
Hi folks! ✋ Today we will play a bit with mapped types. The exercise is about getting all value types...
Advanced TypeScript Exercises - Answer 5
1. Conditional types solution type Config = { name: boolean; lastname: boolean; }; t...