Anne van Kesteren wrote:
Here's the spec for String.prototype.codePointAt:
>
> 8. Let first be the code unit value of the element at index position in the
> String S.
> 11. If second< 0xDC00 or second> 0xDFFF, then return first.
>
> I take it you are objecting to step 11?
And step 8. The indexing is based on code units so you cannot actually
do indexing easily. You'd need to use the iterator to iterate over a
string getting only code points out.
>> The indexing of codePointAt() is also kind of sad as it just passes
>> through to charCodeAt(),
>
> I don't see that in the spec cited above.
How do you read step 8?
8. Let first be the code unit value of the element at index position in
the String S.
This does not "[pass] through to charCodeAt()" literally, which would
mean a call to S.charCodeAt(position). I thought that's what you meant.
So you want a code point index, not a code unit index. That would not be
useful for the lower-level purposes Allen identified. Again it seems
you're trying to abstract away from all the details that probably will
matter for string hackers using these APIs. But I summon Norbert at this
point!
/be
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