objects.js

// Objects

// Array Declartion
const prasannaArray = [
  "Prasanna",
  "Mallisetty",
  20,
  "Automation Tester",
  ["Michael", "Peter", "Steven"],
];

// Object : Key : Value pairs
// Object literal syntax - literally writng the object content
const prasanna = {
  firstName: "Prasanna",
  lastName: "Mallisetty",
  age: 20,
  job: "Automation Test Analyst",
  friends: ["Michael", "Peter", "Steven"],
};

console.log(prasanna);

// Dot Notation(Dot Operator)

console.log(prasanna.lastName);

// Bracket Notation

console.log(prasanna["lastName"]);

// Bracket Notation: we can use the expression within Brackets, where as we cannot do the same in dot notataion
const nameKey = "Name";
console.log(prasanna["first" + nameKey]);
console.log(prasanna["last" + nameKey]);

const interestedIn = prompt(
  "What do you want to know about Prasanna? Choose between firstName, lastName, age, job"
);
console.log(interestedIn);
console.log(prasanna[interestedIn]);

if (prasanna[interestedIn]) {
  console.log(prasanna[interestedIn]);
} else {
  console.log("Wrong request! Choose between firstName, lastName, age, job");
}

// Adding new properties

prasanna.location = "Sydney";
prasanna["twitter"] = "@Prasanna";
console.log(prasanna);