produceCandy with closure

index.js

const produceCandyEfficiently = () => {
  const candyFactory = new Array(7000).fill('sweet candy') 
  //candyFactory is stored in the closure memory, 
  // because it has reference in execution scope of inner function below
  console.log('the candy factory was established');
  return (index) => {
    return candyFactory[index];
  }
}

const getProduceCandyEfficiently = produceCandyEfficiently();

getProduceCandyEfficiently(1243);
getProduceCandyEfficiently(6832);
getProduceCandyEfficiently(345);