An Object is not a Hash

Re:An Object is not a Hash by cousin_it on Tuesday October 09, 2012 @06:05AM (#4630764)

    if (!posts.hasOwnProperty(req.body.slug)) {
      posts[req.body.slug] = new Post(req.body);
      res.send(200);
    }

Maybe I'm missing something, but doesn't that code also happily assign to properties like "constructor", not just "hasOwnProperty"?

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