// assumes variable data, which is a homogenous collection of objects

// get keys
var keys = _.keys(data[0]);

// convert to csv string
var csv = keys.join(",");
_(data).each(function(row) {
  csv += "\n";
  csv += _(keys).map(function(k) {
    return row[k];
  }).join(",");
});

// trick browser into downloading file
var uriContent = "data:application/octet-stream," + encodeURIComponent(csv);
var myWindow = window.open(uriContent, "Nutrient CSV");
myWindow.focus();