muchbetteradventures.ts

// Write a function (in any language) that accepts an array of objects each containing a product name and list of locations (e.g. [“Paris”, “France”, “Europe”]), and returns an array of location objects with a list of names associated with each location. Paste a link to a private gist (gist.github.com) here.

type Product = {
  name: string,
  locations: string[],
};

const products: Product[] = [{name: 'France', locations: ['Paris', 'Chamonix']}]

function groupByLocation(products: Product[]) {
  const groups: {[location: string]: string[]} = {};
  products.forEach(product => {
    product.locations.forEach(location => {
      if(!(location in groups))
        groups[location] = [];
      if(!groups[location].includes(product.name)
        groups[location].push(product.name);
    }
  }
return groups;
}