good point(s), still this should be a native String.prototype or String method, IMHO
On Fri, Nov 30, 2012 at 12:39 PM, Yusuke Suzuki <[email protected]>wrote: > I remember that String object iterator produces the sequence of Unicode > characters. > http://wiki.ecmascript.org/doku.php?id=harmony:iterators#string_iterators > > So I think we can get code points by using array comprehension, > var points = [ch for ch of string]; > > Is it right? > all > > > On Sat, Dec 1, 2012 at 5:33 AM, Mathias Bynens <[email protected]> wrote: > >> ECMAScript 6 introduces some useful new features that make working with >> astral Unicode symbols easier. >> >> One thing that is still missing though (AFAIK) is an easy way to count >> the number of symbols / code points in a given string. As you know, we >> can’t rely on `String.prototype.length` here, as a string containing >> nothing but an astral symbol has a length of `2` instead of `1`: >> >> > var poo = '\u{1F4A9}'; // U+1F4A9 PILE OF POO >> > poo.length >> 2 >> >> Of course it’s possible to write some code yourself to loop over all the >> code units in the string, handle surrogate pairs, and increment a counter >> manually for each full code point, but that’s a pain. >> >> It would be useful to have a new property on `String.prototype` that >> would return the number of Unicode symbols in the string. Something like >> `realLength` (of course, it needs a better name, but you get the idea): >> >> > poo.realLength >> 1 >> >> Another possible solution is to add something like >> `String.prototype.codePoints` which would be an array of the numerical code >> point values in the string. That way, getting the length is only a matter >> of accessing the `length` property of the array: >> >> > poo.codePoints >> [ 0x1F4A9 ] >> > poo.codePoints.length >> 1 >> >> Or perhaps this would be better suited as a method? >> >> > poo.getCodePoints() >> [ 0x1F4A9 ] >> > poo.getCodePoints().length >> 1 >> >> Has anything like this been considered/discussed here yet? >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> > > > > -- > Regards, > Yusuke Suzuki > > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > >
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