getFinalResults.js

async function getFinalResults(kNearest,nDays) {
  var finalResults = [];
  var finalResult = {};
  
  await forEach(kNearest, async(date) => {
    var dateTime = new Date(date);
    var pastDate = dateTime.toISOString().split('T')[0];

    var futureDate = new Date(date);
    futureDate.setDate(futureDate.getDate() + nDays);
    futureDate = futureDate.toISOString().split('T')[0];
    
    var valueForThatDay = this.coinDeskApiResults.bpi[pastDate];
    var valueForFutureDay = this.coinDeskApiResults.bpi[futureDate];

    finalResult = {
      start: valueForThatDay,
      end: valueForFutureDay
    }

    finalResults.push(finalResult);
  })
  return finalResults;

}