I agree map is not really a good fit for strings but this looks like yet another use case for `::` operator
```js const map = [].map; str::map(codeUnits); [...str]::map(codePoints); ``` Why didn't that proposal made it again? It would make *every* request to add prototypal methods redundant! Regards On Thu, May 17, 2018 at 7:12 PM, Jordan Harband <[email protected]> wrote: > What's the use case where you'd want to map over every (character / code > point / grapheme / whatever) in a string, and apply the same callback logic > to each one? > > On Thu, May 17, 2018 at 9:21 AM, kdex <[email protected]> wrote: > >> Yeah; I am aware that ES2015 added measures that make it possible iterate >> over >> codepoints, but that was not quite my point. The problem that I see is >> that in >> some scenarios it makes sense to think of a string as an array of bytes, >> and >> sometimes you need to iterate over a string in terms of its codepoints. >> Some >> might even want to iterate in terms of visible glyphs, taking combining >> marks >> into account. >> >> This ambiguity makes `String.prototype.map` moot, as it remains >> questionable >> what exactly should be iterated. Bytes? Codepoints? Entire glyphs? >> >> On Thursday, May 17, 2018 5:41:32 PM CEST you wrote: >> > Yeah; I am aware that ES2015 added measures that make it possible >> iterate >> > over codepoints, but that was not quite my point. The problem that I >> see is >> > that in some scenarios it makes sense to think of a string as an array >> of >> > bytes, and sometimes you need to iterate over a string in terms of its >> > codepoints. Some might even want to iterate in terms of visible glyphs, >> > taking combining marks into account. >> > >> > This ambiguity makes `String.prototype.map` moot, as it remains >> questionable >> > what exactly should be iterated. Bytes? Codepoints? Entire glyphs? >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> >> > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > >
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