memoize

const calculate = memoize((value: number) => {
  console.log("Calculating...");
  return value * 2;
});

console.log(calculate(5));
// Calculating...
// 10

console.log(calculate(5));
// 10

const add = memoize((a: number, b: number) => {
  console.log("Calculating...");
  return a + b;
});

console.log(add(2, 3));
// Calculating...
// 5

console.log(add(2, 3));
// 5

const getUser = memoize(
  (id: number, name: string) => {
    console.log("Fetching user...");
    return { id, name };
  },
  (id) => id,
);

console.log(getUser(1, "Amir"));
// Fetching user...
// { id: 1, name: "Amir" }

console.log(getUser(1, "Ali"));
// { id: 1, name: "Amir" }

const square = memoize((value: number) => value * value);

console.log(square(4));
// 16

console.log(square(4));
// 16

const double = memoize((value: number) => {
  console.log("Calculating...");
  return value * 2;
});

console.log(double(5));
// Calculating...
// 10

console.log(double(10));
// Calculating...
// 20

const createUser = memoize((name: string) => ({
  name,
}));

const first = createUser("Amir");
const second = createUser("Amir");

console.log(first === second);
// true