Factory Functions & Singleton Pattern

What's the main benefit of refactoring to use a factory function here?

// Before
const car1 = {type: 'Sedan', color: 'blue', engineSize: 2.0};
const car2 = {type: 'SUV', color: 'red', engineSize: 3.0};
const car3 = {type: 'Sedan', color: 'black', engineSize: 1.8};

// After
function createCar(type, color, engineSize) {
  return {type, color, engineSize};
}

const car1 = createCar('Sedan', 'blue', 2.0);
const car2 = createCar('SUV', 'red', 3.0);
const car3 = createCar('Sedan', 'black', 1.8);

Improved memory usage
Faster object creation
Standardized object creation and reduced duplication
The main benefit is standardized object creation and reduced duplication: 1) It centralizes the structure of car objects in one place, 2) It reduces the chance of typos or inconsistent property names, 3) Changes to the car object structure only need to be made in one place, 4) It makes the code more readable by clearly showing the purpose of object creation, 5) It enforces a consistent interface for creating car objects, 6) This refactoring follows the DRY (Don't Repeat Yourself) principle.
Better garbage collection

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