alt Hacker NewsThanks for the reply.
> RegExpExecArray gives you a structure that looks different between the jsdoc version and the typescript version.
> The typescript version has `.groups` inside RegExpExecArray.
The JSDoc version has `.groups` too, and it appears to be typed identically to the TypeScript version given similar configuration.
Here's the TypeScript version: https://www.typescriptlang.org/play/?target=5&strictNullChec...
And here's the JSDoc version: https://www.typescriptlang.org/play/?target=5&strictNullChec...
Could you show me what you mean in the playground? You can change it to JSDoc mode by selecting "JavaScript" in the "Lang" dropdown in the "TS Config" tab.
Your examples has groups only typed as { [key: string]: string }.
It isn't narrowed down to the actual named capture groups inside the regex.
For the whole semver example, we'd want something typed as: { major: string, minor: string, patch: string }.
(sidenote for this semver example and not regex in general: they will be strings because a major of "01" and a patch of "3-prerelease" are both valid. You can parse them into ints later depending on what you're actually doing with the semver)
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For an example of a type narrowed regex in the ts playground, I'll take the lazy route and point you to an example someone else has made:
https://www.typescriptlang.org/play/?ssl=1&ssc=39&pln=1&pc=3...
You can use a utility library (e.g. ts-regexp, arkregex, etc...), you can use one of the utilities that are shared around the typescript spaces online for the one part you need, or you can make your own utility type.
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For my use-case, I just want to know that I can change either my code or regex and I'll be alerted before runtime or buildtime if I've forgotten to account for something.
To carry on with the semver example, if a fourth piece of data was added to the incoming string (e.g. product name, build timestamp, build variant, etc...) and I forgot to update both the code and the regex together and instead only updated one, I'd want an alert in my IDE to tell me that I forgot to update the other one.