e-venetka

function solve(arr){

    let townList=[];

    for(let current of arr){
        let listOfnames=townList.map(x=>x.name);
        let exist=listOfnames.includes(current.town);
       if(exist){
        let townNeeded=townList.find(x=>x.name===current.town);
           let newObjForTown={
               "model":current.model,
               "regNumber":current.regNumber,
           };
          townNeeded.car.push(newObjForTown);
          townNeeded.totalPrice+=Number(current.price);
          townNeeded.totalCar+=1;
       }
       else{
           let newTown={
               'car':[],
               'totalPrice':0,
               'totalCar':0,
               'name':current.town
           };
               let newCar={
                   'model':current.model,
                   'regNumber':current.regNumber,
                   'price':Number(current.price)
               }

              newTown.car.push(newCar);
              newTown.totalPrice+=Number(current.price);
              newTown.totalCar+=1;
              townList.push(newTown);
       }
    }

    let sortedTowns =townList.sort((a,b)=>b.totalPrice - a.totalPrice || b.car.length - a.car.length || a.name.localeCompare(b.name));

    let mostUsedCar=GetMostUsedCar(sortedTowns[0]);

    function GetMostUsedCar(town){

        let array=town.car.map(x=>x.model);
        var counts = {};
        var compare = 0;
        var mostFrequent;
        for(var i = 0, len = array.length; i < len; i++){
            var word = array[i];

            if(counts[word] === undefined){
                counts[word] = 1;
            }else{
                counts[word] = counts[word] + 1;
            }
            if(counts[word] > compare){
                  compare = counts[word];
                  mostFrequent = array[i];
            }
         }
       return mostFrequent;
    }
    let firstTown=sortedTowns[0];
    console.log(`${firstTown.name} is most profitable - ${firstTown.totalPrice} BGN`);
    console.log(`Most driven model: ${mostUsedCar}`);
    let printTowns=sortedTowns
    .sort((a,b)=>a.name.localeCompare(b.name))
    .filter(x=>x.car.some(c=>c.model===mostUsedCar))
    .filter(x=>x)
    .map(x=>{
        return {
            "townName":x.name,
            "plates":x.car.filter(x=>x.model===mostUsedCar)
            .map(x=>x.regNumber)
            .sort((a,b)=>a.localeCompare(b))
            .join(', ')
        }
    });
    printTowns.forEach(x=>console.log(`${x.townName}: ${x.plates}`));
}