Use case suggestion: Get unique values from object array property

const objects = [
 { id: 1 , category: "Cars", brand: "Subaru" },
 { id: 2 , category: "Cars", brand: "Ford" },
 { id: 3 , category: "Smatphones", brand: "Apple" },
 { id: 4 , category: "Cars", brand: "Citroen" },
];

categories = [...new Set(objects.map(object => object.category))];

console.log(categories);
//=> [ "Cars", "Smartphones" ]

[jadjoubran]

🎬, more info on #97

[sabatesduran]

Now I see that could be maybe just remove duplicates in array.

const items = [ "Cars", "Cars", "Smartphone", "Cars" ];

const uniqueItems = [...new Set(items)];

console.log(uniqueItems);
//=> [ "Cars", "Smartphones" ]