code: function transformHashArrayData(stream, item) {
      var vals = [], row = [], i = -1, headersLength = stream.headersLength;
      if (stream.totalCount++) {
          row.push(stream.rowDelimiter);
      }
      while (++i < headersLength) {
          vals[i] = item[i][1];
      }
      row.push(stream.formatter(vals));
      return row.join("");
  }
docs: transform an array of two item arrays into a CSV row