Sorting the keys of objects within an array

Currently, I am in the midst of an evaluation where I have the freedom to utilize any resources at my disposal. The task at hand involves using the .filter method to remove objects without a specific key. Here is the provided prompt...

Create a function named cookieLoversOnly that receives an array and filters out any object that does not contain the key favoriteCookie. The filtered array should be returned by the cookieLoversOnly function.

This code represents my progress so far...

function cookieLoversOnly(arr){
return arr.filter(e => arr[e]===favoriteCookie)
}

javascriptarrays

Answer №1

Below are instances of 

arr.filter(e => !e.favouriteCookie)

let individuals = [
  {
    name: 'Mr Fooman',
    job: 'Dog walker',
    favouriteAnimal: 'Dog'
  },
  {
    job: 'Barman',
    favouriteFood: 'Cookies',
    favouriteCookie: 'Double Choc Chip',
    favouriteAnimal: 'Fox'
  },
  {
    name: 'Miss Baz',
    favouriteFood: 'Caesar Salad',
    favouriteCookie: 'Raisin',
    favouriteAnimal: 'Elephant'
  }
];
let creatures = [
  {
    name: "demon 1",
    favouriteCookie: false
  },
  {
    name: "demon 2",
    favouriteCookie: true
  },
  {
    name: "demon 3",
    favouriteCookie: undefined
  },
  {
    name: "demon 4",
    favouriteCookie: null
  }
];

function onlyCookieLovers(arr){
  return arr.filter(e => e.favouriteCookie)
}

console.log("individuals:", onlyCookieLovers(individuals));

console.log("creatures:", onlyCookieLovers(creatures));

This explanation may seem incorrect if you interpret the question literally.

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