toArray() : The toArray() method converts the collection into a plain array. If the collection is an object, an array containing the values will be returned.
const collection = collect([1, 2, 3, 'b', 'c']);
collection.toArray();
// [1, 2, 3, 'b', 'c']
const collection = collect({
  name: 'Elon Musk',
  companies: ['Tesla', 'Space X', 'SolarCity'],
});
collection.toArray();
// ['Elon Musk', ['Tesla', 'Space X', 'SolarCity']]
 
toJson() : The toJson() method converts the collection into JSON string:
const collection = collect({
  id: 384,
  name: 'Rayquaza',
  gender: 'NA',
});
const json = collection.toJson();
// {"id": 384, "name": "Rayquaza", "gender": "NA"}