Devoir maison 🪛

On a une BD avec des objets villes. Pour chaque ville, on dispose des propriétés name et population (le nb d'habitants.

db = new BD([{ name: "Vincennes", population: 45000 },
{ name: "Paris", population: 3000000 }, { name: "roubais", population: 45000 }]);

🥇Trouvez toutes les villes avec 45000 habitants pour mettre 50000.

👹Trouvez la ville de Paris pour ajouter la propriétée capitale.

	class BD {
	constructor(db) {
	this.db = db;
	}
	/**
	* Finds items based on a query given as a JS object
	*
	* @param {object} query The query to match against (i.e. {name: 'paris'})
	* @param {function} callback The callback to fire when the query has
	* completed running
	**/
	find(query, callback) {
	callback(this.db.filter(function (city) {
	for (const [key, value] of Object.entries(query)) {
	if (city[key] !== value) {
	return false
	}
	}
	return true
	}))
	}
	}
	// cities
	const db = new BD([{ name: "Vincennes", population: 40000 },
	{ name: "Paris", population: 2161000 }, { name: "roubais", population: 45000 }]);
	//console.log(s.db);
	db.find({ population: 45000 }, function (cities) {
	for (let city of cities) {
	city["population"] = 50000;
	}
	});
	db.find({ name: "Paris" }, function (cities) {
	for (let city of cities) {
	city["capital"] = true;
	}
	});
	console.log(db);

view raw bd.js hosted with ❤ by GitHub