Create array of unique entries in dataset (not deep)

extractListFrom.js

/**
 * Create array of unique entries in dataset (not deep) 
 * @Example
 * const data = [ { regionId: 123, indicatorId: 345 }, { regionId: 123, indicatorId: 345 }, { regionId: 678, indicatorId: 910 }]
 * extractListFrom('regionId', 'indicatorId')(data);
 */
export function extractListFrom(...args) {
  const accum = args.reduce((ac, arg) => { ac[arg] = new Set(); return ac }, {});
  return data => data.reduce((acc, m) => {
    Object.keys(acc).forEach(key => acc[key].add(m[key]))
    return acc
  }, accum)
};