New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
type-challenges-solutions/en/medium-trim #282
Labels
Comments
Left trim and right trim can combined by using union also as in below. type Trim<S> = S extends `${infer L}${Whitespace}` | `${Whitespace}${infer R}` ? Trim<T> :S; |
@gauravpan interesting, can you explain step by step why it works? |
As suggested by @gauravpan, we could tell TS to check if there is a white space to either left or right of the string, and let it infer the correct type Whitespace = " " | "\n" | "\t";
type Trim<S> = S extends
| `${infer Rest}${Whitespace}`
| `${Whitespace}${infer Rest}`
? Trim<Rest>
: S; |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Trim
This project is aimed at helping you better understand how the type system works, writing your own utilities, or just having fun with the challenges.
https://ghaiklor.github.io/type-challenges-solutions/en/medium-trim.html
The text was updated successfully, but these errors were encountered: