Blog- Optimizing React apps with Memo

func-compare.js

function funcObj() {
  return {
    ans: 42,
  };
}

function funcArr() {
  return [42];
}

function funcFunc() {
  const sum = () => {
    console.log('I am sum function');
  }

  return sum;
}

const multiply = () => {
  console.log('I am multiply function');
}

function funcKey() {
  return multiply;
}

console.log(funcObj() === funcObj());    // false
console.log(funcArr() === funcArr());    // false
console.log(funcFunc() === funcFunc());  // false
console.log(funcKey() === funcKey());    // true