Accepted answer

You basically have two options here: 1. Munge your data into a format that's easier to deal with 2. Try to deal with your current format.

I think (1) is going to make your life easier in most cases:

data = {
    // get the date
    var date = d3.keys(d)[0];
    // put it into the inner object
    d[date].date = date;
    // return the inner object
    return d[date];

This gives you rows like

  "orders": "10",
  "revenue": "1000",
  "date": "2013-08-21"

which are much easier to deal with. Might also be a good idea to parse the date as you do this.

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