Kết quả đoạn code sau là gì?

  const myPromise = () => Promise.resolve("I have resolved!");
  function firstFunction() {
  myPromise().then((res) => console.log(res));
  console.log("second");
  }
  async function secondFunction() {
  console.log(await myPromise());
  console.log("second");
  }
  firstFunction();
  secondFunction();

• A: I have resolved!, second và I have resolved!, second
• B: second, I have resolved! và second, I have resolved!
• C: I have resolved!, second và second, I have resolved!
• D: second, I have resolved! và I have resolved!, second

IIFEs (Immediately Invoked Function Expressions) là gì?

Anonymous Function thường dùng cho trường hợp nào?

Kết quả đoạn code sau là gì?

  let num = 10;

  const increaseNumber = () => num++;
  const increasePassedNumber = number => number++;

  const num1 = increaseNumber();
  const num2 = increasePassedNumber(num1);

  console.log(num1);
  console.log(num2);

• A: 10, 10
• B: 10, 11
• C: 11, 11
• D: 11, 12

An array is positive dominant if it contains strictly more unique positive values than unique negative values. Write a function dominant.

e.g. isPositiveDominant([1,1,-2,-3]) -> false
isPositiveDominant([1,2,3,-1,-2]) -> true

How do you check if a variable holds an array?