Create Unique Array, Remove Array Duplicates

array-create-unique.js

const products = [
  {id: 1, title: "Trim Dress", category: "women", collection: ["new", "featured"]},
  {id: 2, title: "Belted Dress", category: "women", collection: ["featured"]},
  {id: 3, title: "Fitted Dress", category: "men", collection: ["new"]}
];

const categories = new Set(
  products.map(product => product.category)
);

// Created using inner array
const collection = new Set(
  ...products.map(product => 
    product.collection.map(item => item)
  )
);

console.log([...categories]);
// ["women", "men"]

console.log([...collection]);
// ["new", "featured"]

array-remove-duplicate.js

const numeros = [2,3,4,4,2,3,3,4,4,5,5,6,6,7,5,32,3,4,5];
 
console.log([...new Set(numeros)]);

// [2, 3, 4, 5, 6, 7, 32]