export function capitalize<T extends string>(s: T) {
  return s.charAt(0).toUpperCase() + s.slice(1) as Capitalize<T>;
}

export function getCommonPart(s1: string, s2: string) {
  if (typeof s1 !== 'string' || typeof s2 !== 'string') return '';
  const l = Math.min(s1.length, s2.length);
  let i = 0;
  while (i < l && s1.charAt(i) === s2.charAt(i)) i++;
  return s1.substring(0, i);
}