better-option.js

var userPreferencesDict = [
  'favoriteFood',
  'favoriteColor',
  'favoriteNumber',
];

var userPreferences = [
  'pizza',
  'seafoam green',
  '42'
];

function Dictionary (dict, array) {
  return new Proxy([dict, array], {
    get ([keys, values], key) {
      const index = keys.indexOf(key);
      return values[index];
    }
  });
}

const preferences = new Dictionary(userPreferencesDict, userPreferences);
preferences.favoriteFood;   // => pizza
preferences.favoriteColor;  // => seafoam green
preferences.favoriteNumber; // => 42

commented.js

function foo () {
  // 0: Favorite Food
  // 1: Favorite Color
  // 2: Favorite Number
  
  var userPreferences = [
    'pizza',
    'seafoam green',
    '42'
  ];
}

data-structure.js

var userPreferences = [
  'pizza',
  'seafoam green',
  '42'
];

knowledge.js

userPreferences[0] // Favorite Food
userPreferences[1] // Favorite Color
userPreferences[2] // Favorite Number