const personOne = {
firstName : "Elon",
secondName : "Musk"
}
const getFullName = function(company, country) {
console.log(this.firstName + " " + this.secondName + ", " + company + ", " + country);
}
const personTwo = {
firstName : "Mark",
secondName : "Zuckerburg"
}
getFullName.call(personOne, "Tesla", "United States"); // outputs Elon Musk, Tesla, United States
getFullName.call(personTwo, "Facebook", "United States"); // outputs Mark Zuckerberg, Facebook, United States