You could use v8::Object::GetOwnPropertyNames instead of trying each key
individually
On Tue, Dec 6, 2016 at 11:04 PM kent williams <chaircrus...@gmail.com>
wrote:
> There's a convention that we use for our C++ native functions called from
> C++, where required arguments are followed (optionally) by an object whose
> properties are additional flags. EG
>
> var num = convertNumber(x);
> var num2 = convertNumber(x, { base: 8 });
>
> Is there a streamlined way to extract properties from this optional object?
>
> I end up doing this:
>
> v8::Local<v8::Object> argsObj;
> argsObj.Clear();
> if(args.Length() >=2)
> argsObj = args[1];
>
> const char *cvval = 0;
> if(!argsObj.IsEmpty()) {
> v8::Local<v8::String> cvt = v8::String::NewFromUtf8(isolate,
> "convert",
> v8::NewStringType::kNormal).ToLocalChecked();
> v8::MaybeLocal<v8::Value> convertval = argsObj->Get(context,cvt);
>
> if(!convertval.IsEmpty()) {
> v8::Local<v8::Value> cv = convertval.ToLocalChecked();
> v8::String::Utf8Value val2 = cv->ToString();
> cvval = *val2 ? *val2 : 0;
> }
> }
>
> This seems like a whole lot of work -- way more than Spidermonkey, for
> example.
>
> Are there some convenience functions that make this less painful, or do I
> have to write my own?
>
> Thanks!
>
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