Function zeroPad

src/playground.ts:869–872

(n: number)

  });

  function zeroPad(n: number): string {
    let pad = "000000";
    return (pad + n).slice(-pad.length);
  }

  function addCommas(s: string): string {
    return s.replace(/\B(?=(\d{3})+(?!\d))/g, ",");