he/him 
What's the best use you've seen of a generator function in JavaScript? Where do they really shine?
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There's a usage in Rome for the module resolver. When resolving a module there's various forms it can take. Implicit extensions, platform extensions etc. There's a generator that "generates" these. The most common paths are emitted first. When the consumers find one, they break.
There's overhead from using a generator but who cares. I don't know of another way to write this without having a lot of bookkeeping and manual callbacks.https://github.com/facebookexperimental/rome/blob/master/packages/%40romejs/core/master/fs/Resolver.ts#L437-L508 …
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Mmm, very interesting. I do some module resolution on unpkg, but I know all the files in a package upfront, so the search is as easy as just doing e.g. `path || ${path}.js || ${path}/index.js`. Very different use case, but I immediately recognized what your code was doing
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