Function processProperty

src/scripts/hatAdjustments/add.ts:23–32

(
  hatAdjustmentsList: HatAdjustments[],
  propertyName: keyof HatAdjustments
)

];

function processProperty(
  hatAdjustmentsList: HatAdjustments[],
  propertyName: keyof HatAdjustments
) {
  let value = sum(
    hatAdjustmentsList.map((adjustment) => adjustment[propertyName] ?? 0)
  );

  return postProcessValue(value);
}

function main() {
  const finalMap = Object.fromEntries(