i have a problem with logging something from an array. I need to find the highest rated locations from each place and i need to log the name and coordinates from those 3 locations. I have been stuck here for a while now anyone know how to do this?
this is the code i already have:
let locaties = [
{naam: 'locatie1', type: 'cafe', rating: 8, coordinaat: {lat: 17, lon: 3},},
{naam: 'locatie2', type: 'winkel', rating: 3, coordinaat: {lat: 23, lon: 9},},
{naam: 'locatie3', type: 'Restaurant', rating: 7, coordinaat: {lat: 3, lon: 17},},
{naam: 'locatie4', type: 'winkel', rating: 7, cordinaat: {lat: 20, lon: 10},},
{naam: 'locatie5', type: 'cafe', rating: 1, coordinaat: {lat: 12, lon: 13},},
{naam: 'locatie6', type: 'winkel', rating: 5, coordinaat: {lat: 13, lon: 2},},
{naam: 'locatie7', type: 'Restaurant', rating: 6, coordinaat: {lat: 7, lon: 17},},
{naam: 'locatie8', type: 'Restaurant', rating: 2, cordinaat: {lat: 3, lon: 15},},
{naam: 'locatie9', type: 'cafe', rating: 4, coordinaat: {lat: 30, lon: 12},},
{naam: 'locatie10', type: 'winkel', rating: 9, cordinaat: {lat: 27, lon: 19},},
];
Object.keys(locaties).forEach(key => {
console.log(key);
console.log(locaties[key].naam);
})
let locations = [{
name: 'locatie1',
type: 'cafe',
rating: 8,
coordinate: {
lat: 17,
lon: 3
},
},
{
name: 'locatie2',
type: 'winkel',
rating: 3,
coordinate: {
lat: 23,
lon: 9
},
},
{
name: 'locatie3',
type: 'Restaurant',
rating: 7,
coordinate: {
lat: 3,
lon: 17
},
},
{
name: 'locatie4',
type: 'winkel',
rating: 7,
coordinate: {
lat: 20,
lon: 10
},
},
{
name: 'locatie5',
type: 'cafe',
rating: 1,
coordinate: {
lat: 12,
lon: 13
},
},
{
name: 'locatie6',
type: 'winkel',
rating: 5,
coordinate: {
lat: 13,
lon: 2
},
},
{
name: 'locatie7',
type: 'Restaurant',
rating: 6,
coordinate: {
lat: 7,
lon: 17
},
},
{
name: 'locatie8',
type: 'Restaurant',
rating: 2,
coordinate: {
lat: 3,
lon: 15
},
},
{
name: 'locatie9',
type: 'cafe',
rating: 4,
coordinate: {
lat: 30,
lon: 12
},
},
{
name: 'locatie10',
type: 'winkel',
rating: 9,
coordinate: {
lat: 27,
lon: 19
},
},
];
highest_rated_locations = locations
.sort((a, b) => b.rating - a.rating) // order elements by rating descending. Note: the original locations array changes, since the sort method is mutable, if the original array shouldn't be changed, use Array.from
.slice(0, 3) // return the first three elements of the array
for (const location of highest_rated_locations) {
console.log(`Name: ${location.name} | Lattitude: ${location.coordinate.lat} | Longitude: ${location.coordinate.lon}`)
}I adjusted some names in the code for better understanding. For some explanation, Object.keys() returns all the keys of the given Object. In your case this is an array and the values will be 0, 1, 2, .... If you would do this with one of the objects inside the array, for example Object.keys(locations[0]) you would get the following: name, type, rating, coordinate. lat and lan won't be in there since those are nested properties of coordinate. I would suggest to you, that you inform yourself a bit about javascript loops, since they are pretty important.