findApplicableSplitsAgainstDividendYear.js

export const findApplicableSplitsAgainstDividendYear = (dividendYear, splits) => {
  const formattedDividendYear = Number(moment(dividendYear).format('X'));

  return splits.reduce((acc, split) => {
    const formattedExDate = Number(moment(split.exDate).format('X'));

    return formattedExDate > formattedDividendYear ?
      [
        ...acc,
        split.ratio
      ] :
      acc;
  }, []);
}