function sum(a) {
  let currentSum = a;

  function f(b) {
    currentSum += b;
    return f;
  }
  f.toString = function () {
    return currentSum;
  };

  return f;
}

alert(sum(1)(2)(3)(5));

integrations.sort((a, b) => a.title.localeCompare(b.title));

type Person = {
  name: string;
  age: number;
  address: string;
};

type PersonWithoutAddress = Omit<Person, 'address'>;
// Результат: { name: string; age: number; }


type A = string | number | boolean;
type B = Exclude<A, boolean>;
// Результат: string | number

let a = null;
a ??= 10;
console.log(a); // 10

let b = 5;
b ??= 20;
console.log(b); // 5 (значение не изменилось, так как b не null и не undefined)