function clone(value) {
  switch(typeof value) {
      case 'object':
          if(Array.isArray(value)) return value.map(v=>clone(v));
          const newObj = {};
          for(const key in value) newObj[key] = clone(value[key]);
          return newObj;
      default: return value;
  }
}

function max(...arr) {
  return Math.max(...arr.flat());
}

function min(...arr) {
  return Math.min(...arr.flat());
}

function sum(...arr) {
  let s = 0;
  arr.flat().forEach(v=>s+=v);
  return s;
}

function average(...arr) {
  const s = sum(...arr);
  return s / arr.flat().length;
}

export { clone, max, min, sum, average };