15. Turn Object into JSON String

function solve(arr) {
    let obj = {};

    for(line of arr) {
        let tokens = line.split(' -> ');
        obj[tokens[0]] = +tokens[1] ? +tokens[1] : tokens[1];
    }

    console.log(JSON.stringify(obj));
}

//solve(['name -> Angel','surname -> Georgiev', 'age -> 20', 'grade -> 6.00', 'date -> 23/05/1995', 'town -> Sofia']);