v8: Array of objects - c++

Question

I'm transforming a parser for v8 in NodeJS. Currently I have the following structure
struct Node {
short tag;
std::string data;
Node(std::string input, short tagId) {
tag = tagId;
data = input;
}
};
std::vector<Node> elems;
And I'm populating the vector from loop like this:
elems.push_back(Node(STRING, 3));
My goal is return a javascript object like this:
[
{ tag: 2, data: "asdsad" },
{ tag: 2, data: "asdsad" },
{ tag: 2, data: "asdsad" }
]
But since the V8 documentation is crappy, I couldn't figure out how to do it. My best shot was to make
Local<Value> data[2] = {
Local<Value>::New(Integer::New(2)),
String::New("test")
};
but I can't figure out how to make it an array and return it.
I'm using this example as template.

Answer 1

Here's what you might try (node v0.10.x):
// in globals
static Persistent<String> data_symbol;
static Persistent<String> tag_symbol;
// in addon initialization function
data_symbol = NODE_PSYMBOL("data");
tag_symbol = NODE_PSYMBOL("tag");
// in some function somewhere
HandleScope scope;
Local<Array> nodes = Array::New();
for (unsigned int i = 0; i < elems.length; ++i) {
HandleScope scope;
Local<Object> node_obj = Object::New();
node_obj->Set(data_symbol, String::New(elems[i].data.c_str()));
node_obj->Set(tag_symbol, Integer::New(elems[i].tag));
nodes->Set(i, node_obj);
}
return scope.Close(nodes);

Answer 2

I was looking for a solution for Node 5, and it seems mscdex's answer is outdated now. Hope this helps someone.
HandleScope scope(isolate);
Local<Array> nodes = Array::New(isolate);
for (unsigned int i = 0; i < elems.length; ++i) {
HandleScope scope(isolate);
Local<Object> node = Object::New(isolate);
node->Set(String::NewFromUtf8(isolate, "data"), String::New(isolate, elems[i].data.c_str()));
node->Set(String::NewFromUtf8(isolate, "tag"), Integer::New(isolate, elems[i].tag));
nodes->Set(i, node);
}
args.GetReturnValue().Set(nodes);