Joins in Javascript

Question

I have 2 lists of objects:

people = 
[{id: 1, name: \"Tom\", carid: 1},
 {id: 2, name: \"Bob\", carid: 1},
 {id: 3, name: \"Sir Benjamin Rogan-Josh IV\", car         


        

Answer 1

You can do such stuff in plain javascript.

people.map(man => 
        cars.some(car => car.id === man.carid) ? 
            cars.filter(car => car.id === man.carid).map(car => ({car, man})) : 
            {man}
        ).reduce((a,b)=> a.concat(b),[]);