domenic at domenicdenicola.com (2013-10-26T03:01:44.433Z)
+1 for the simplified `at(symbolIndex)` I would expect `'𝌆'.at(1)` to fail same way `'a'.charAt(1)` or `'a'.charCodeAt(1)` would. I would expect `'𝌆'.at(symbolIndex)` to behave as `length` does based on unique symbol (unicode extra) so that everyone, except RAM and CPU, will have life easier with strings. Long story short: there's no symbol at 1, the symbol is at 0 because the size of that unicode string is 1 That said, I am sure the discussion went through this already ^_^
+1 for the simplified `at(symbolIndex)` I would expect '𝌆'.at(1) to fail same way 'a'.charAt(1) or 'a'.charCodeAt(1) would. I would expect '𝌆'.at(symbolIndex) to behave as `length` does based on unique symbol (unicode extra) so that everyone, except RAM and CPU, will have life easier with strings. Long story short: there's no symbol at 1, the symbol is at 0 because the size of that unicode string is 1 That said, I am sure the discussion went through this already ^_^ On Fri, Oct 18, 2013 at 9:57 AM, Allen Wirfs-Brock <allen at wirfs-brock.com>wrote: > > On Oct 18, 2013, at 7:21 AM, Rick Waldron wrote: > > > > > On Fri, Oct 18, 2013 at 8:46 AM, Mathias Bynens <mathias at qiwi.be> wrote: > >> ES6 fixes `String.fromCharCode` by introducing `String.fromCodePoint`. >> >> Similarly, `String.prototype.charCodeAt` is fixed by >> `String.prototype.codePointAt`. >> >> Should there be a method that is like `String.prototype.charAt` except it >> deals with astral Unicode symbols wherever possible? >> >> >> '𝌆'.charAt(0) // U+1D306 >> '\uD834' // the first surrogate half for U+1D306 >> >> >> '𝌆'.symbolAt(0) // U+1D306 >> '𝌆' // U+1D306 >> > > I think the idea is good, but the name may be confusing with regard to > Symbols (maybe not?) > > > Given that we have charAt, charCodeAt and codePointAt, I think the most > appropiate name for such a method would be 'at': > '𝌆'.at(0) > > The issue when this sort of method has been discussed in the past has been > what to do when you index at a trailing surrogate possition: > > '𝌆'.at(1) > > do you still get '𝌆' or do you get the equivalent of > String.fromCharCode('𝌆'[1]) ? > > Allen > > > _______________________________________________ > es-discuss mailing list > es-discuss at mozilla.org > https://mail.mozilla.org/listinfo/es-discuss > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.mozilla.org/pipermail/es-discuss/attachments/20131018/28341207/attachment-0001.html>