utils.ts

/**
 * Rounds a number to one digit after the period dot or null, if the input is not a number
 * @param n number to round
 */
export function roundOne(n: number): number | null {
  if (typeof n === "number" && !isNaN(n)) {
    return Math.round(n * Math.pow(10, 1)) / Math.pow(10, 1);
  } else {
    return null;
  }
}

export function sumIgnoreNonNumbers(values: number[]): number {
  return values
    .filter((n) => typeof n === "number")
    .reduce((acc, curr) => acc + curr, 0);
}