Get a Unique List of Objects in an Array of Object in JavaScript

code.gs

/* Check out the link for the full tutorial and video guide
 * {@link https://yagisanatode.com/2021/07/03/get-a-unique-list-of-objects-in-an-array-of-object-in-javascript/ |Get a Unique List of Objects in an Array of Object in JavaScript} 
 */
const myObjArray = [
    {
        name: "Eva Devore",
        character: "Evandra",
        episodes: 15,
    },
    {
        name: "Alessia Medina",
        character: "Nixie",
        episodes: 15,
    },
    {
        name: "Kendall Drury",
        character: "DM",
        episodes: 15,
    },
    {
        name: "Thomas Taufan",
        character: "Antrius",
        episodes: 14,
    },
    {
        name: "Alessia Medina",
        character: "Nixie",
        episodes: 15,
    },
];

// Creates an array of objects with unique "name" property values.
let uniqueObjArray = [
    ...new Map(myObjArray.map((item) => [item["name"], item])).values(),
];

console.log("uniqueObjArray", uniqueObjArray);

// LOGS:
// uniqueObjArray [
//   { name: 'Eva Devore', character: 'Evandra', episodes: 15 },
//   { name: 'Alessia Medina', character: 'Nixie', episodes: 15 },
//   { name: 'Kendall Drury', character: 'DM', episodes: 15 },
//   { name: 'Thomas Taufan', character: 'Antrius', episodes: 14 }
// ]

// Creates a new 2d array with the selected key in position 0 and the object in position 1 of each iteration.
let test_uniqueObjArray_map = myObjArray.map((item) => {
    return [item["name"], item];
});

// LOGS: test_uniqueObjArray_map
// [
//     ["Eva Devore", { name: "Eva Devore", character: "Evandra", episodes: 15 }],
//     ["Alessia Medina",{ name: "Alessia Medina", character: "Nixie", episodes: 15 }],
//     ["Kendall Drury", { name: "Kendall Drury", character: "DM", episodes: 15 }],
//     ["Thomas Taufan", { name: "Thomas Taufan", character: "Antrius", episodes: 14 }],
//     ["Alessia Medina",{ name: "Alessia Medina", character: "Nixie", episodes: 15 }]
// ];

console.log("test_uniqueObjArray_map", test_uniqueObjArray_map);

// Creates a key-value map of a 2d array
let valuesObject = new Map([
    ["key_one", "val_one"],
    ["key_two", "val_two"],
    ["key_three", "val_three"],
]);
console.log("valuesObject", valuesObject);

// LOGS: valuesObject Map {
//   'key_one' => 'val_one',
//   'key_two' => 'val_two',
//   'key_three' => 'val_three'
// }

// Create a new Map from our mapped data.
let test_uniqueObjArray_NewMap = new Map(test_uniqueObjArray_map);

// LOGS: test_uniqueObjArray_NewMap Map {
//   'Eva Devore' => { name: 'Eva Devore', character: 'Evandra', episodes: 15 },
//   'Alessia Medina' => { name: 'Alessia Medina', character: 'Nixie', episodes: 15 },
//   'Kendall Drury' => { name: 'Kendall Drury', character: 'DM', episodes: 15 },
//   'Thomas Taufan' => { name: 'Thomas Taufan', character: 'Antrius', episodes: 14 }
// }

console.log("test_uniqueObjArray_NewMap", test_uniqueObjArray_NewMap);

let test_uniqueObjArray_NewMap_keys = test_uniqueObjArray_NewMap.keys();

console.log("test_uniqueObjArray_NewMap_keys", test_uniqueObjArray_NewMap_keys);

// LOGS: test_uniqueObjArray_NewMap_keys [Map Iterator] {
//   'Eva Devore',
//   'Alessia Medina',
//   'Kendall Drury',
//   'Thomas Taufan'
// }

let test_uniqueObjArray_NewMap_values = test_uniqueObjArray_NewMap.values();

console.log(
    "test_uniqueObjArray_NewMap_values",
    test_uniqueObjArray_NewMap_values
);

// LOGS: test_uniqueObjArray_NewMap_values [Map Iterator] {
//   { name: 'Eva Devore', character: 'Evandra', episodes: 15 },
//   { name: 'Alessia Medina', character: 'Nixie', episodes: 15 },
//   { name: 'Kendall Drury', character: 'DM', episodes: 15 },
//   { name: 'Thomas Taufan', character: 'Antrius', episodes: 14 }
// }

// let test_uniqueObjArray_NewMap_values_asArray = Array.from(
//     test_uniqueObjArray_NewMap_values
// );

let test_uniqueObjArray_NewMap_values_asArray = [
    ...test_uniqueObjArray_NewMap_values,
];

// LOGS: test_uniqueObjArray_NewMap_values_asArray [
//   { name: 'Eva Devore', character: 'Evandra', episodes: 15 },
//   { name: 'Alessia Medina', character: 'Nixie', episodes: 15 },
//   { name: 'Kendall Drury', character: 'DM', episodes: 15 },
//   { name: 'Thomas Taufan', character: 'Antrius', episodes: 14 }
// ]

console.log(
    "test_uniqueObjArray_NewMap_values_asArray",
    test_uniqueObjArray_NewMap_values_asArray
);