js-grill

memo-function.ts

const plusFunction = (a: number, b: number) => a + b;

const memoFunction = (fn: (...args: any) => any) => {
  const cache: Record<string, any> = {};
  return (...args: any) => {
    const key = JSON.stringify(args);
    if (cache[key]) {
      return cache[key];
    }
    const result = fn(...args);
    cache[key] = result;
    return result;
  };
};

const memoPlus = memoFunction(plusFunction);

console.log(memoPlus(1, 2)); // 3 (вызов plus)
console.log(memoPlus(3, 1)); // 4 (вызов plus)
console.log(memoPlus(1, 2)); // 3 (обращение к cache)