dataflow-example/dataflow_files/transformCSVtoJSON.js

function transformCSVtoJSON(line) {
  var values = line.split(',');
  var properties = [
    'location',
    'average_temperature',
    'month',
    'inches_of_rain',
    'is_current',
    'latest_measurement',
  ];

  var weatherInCity = {};
  for (var count = 0; count < values.length; count++) {
    if (values[count] !== 'null') {
      weatherInCity[properties[count]] = values[count];
    }
  }

  return JSON.stringify(weatherInCity);
}