ayakovlenko/typescriptlings

Small exercises to get you used to reading and writing TypeScript code!

typescriptlings's Issues

Need exercises for intersection types

I only discovered there is such a concept in TS just now when Googling the proper term for union types. I managed to upgrade my JS project to TS without discovering them. Maybe they would've helped. Since they're a concept I haven't touched yet I don't have specific ideas to suggest for what should be in the exercises though.

Need exercises on Narrowing

In my limited experience converting code from JS to TS I know I used narrowing and while I get the concept and its utility I didn't really grasp exactly what it can and can't do in TS and how it works. Some exercises on that topic would surely help other people.

Where are the hints?

Each exercise has the line:

// I DON'T NEED A HINT

But I can't find how to access the hints. Are there any hints, or is that not implemented yet?

In Rustlings I can type hint as a command to get a hint for the current exercise in its equivalent of the vr start interactive loop.

Need exercises on Generics

For programmers coming from other languages, TS generics may be more or less like the generics and templates in other languages they already know. But if you're used to C++ templates they may not actually work as similarly as they appear. And if coming from JS you may have never came across a similar concept before.

Need exercises for optionals and the ? and ! operators

I'm not experienced enough yet at TS to suggest what the exercises should be but it's a core component of TS that JS doesn't really have.

Need exercises on interfaces

I managed to convert my project from JS to TS without really grasping typescript interfaces. Seems to be a key topic a person new to TS will want to learn. Unfortunately I'm not yet able to describe what specifically should be covered though.

Need exercises for union types

The type annotations that look like string | null were one of the first things I noticed when coming to TS for JS. I'm not yet experienced enough at TS to have specific suggestions as to what the exercises should be though.