gistfile1.txt

function series(state = {}, action) {
  switch (action.type) {
  case RECEIVE_SERIES_DATA:
  const series = action.data.length ? action.data : [action.data]
  return series.reduce((acc, series) => {
  return Object.assign({}, acc, { [series.unique_key] : series })
  }, state)

  default: 
  return state
  }
  return state 
}