JavaScript array filter()

filter.js

let animals = [
    {name: 'Tibbers', type: 'cat', isNeutered: true, age: 2},
    {name: 'Fluffball', type: 'rabbit', isNeutered: false, age: 1},
    {name: 'Strawhat', type: 'cat', isNeutered: true, age: 5}
  ]

 /*using functional filter() where a represents an item in the array*/
 let neuteredAnimals = animals.filter((a) => {
     return a.isNeutered;
 });