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JS

              
                ///////////////////////////////// Writing Methods ////////////////////////////////

// As mentioned earlier, objects can have methods that we can invoke to perform some kind of function or action on the object

// Methods are stored as an object property, but are programmed by defining a new function to assign the property to

// To look at a few examples, we will use the employee object below:

// The employee object will represent an employee of our imaginary company, Katie Johnson.

// This object stores the information for employee Katie Johnson, with properties for her name, ID, phone number, address, hourly wage, and number of hours worked this week.

// The last property of the employee object will be the method called "printEmployeeInfo"

// The printEmployeeInfo method declares a new function that returns the employee ID and full name in a formatted order

// You'll notice that the method uses a new keyword we haven't worked with yet, "this"

// When used in an object method, the 'this' keyword refers to the object in context.

// On line 30, this.firstName is equivalent to saying employee.firstName:
let employee = {
  firstName: "Katie",
  lastName: "Johnson",
  employeeID: 295025,
  phone: 4560001234,
  address: "42 Wallaby Way",
  wage: 13.5,
  hoursWorked: 25,
  printEmployeeInfo: function() {
    return (
      "Employee #" +
      this.employeeID +
      " : " +
      this.firstName +
      " " +
      this.lastName
    );
  }
};

console.log(employee.printEmployeeInfo());

// Next, lets add a method to the employee object that calculates their weekly pay
// This method will be called "paycheck" and will return the product of the employee object's wage property and the employee object's hoursWorked property:

employee.paycheck = function() {
  return "$" + this.wage * this.hoursWorked;
};

// Now, we can invoke the paycheck method like so:

let income = employee.paycheck();
console.log(income);

// or:

console.log(
  "Employee #" +
    employee.employeeID +
    " worked " +
    employee.hoursWorked +
    " hours this week and earned " +
    employee.paycheck()
);

// Try updating the hoursWorked property to a number greater than 25, and invoking the paycheck method again:

employee.hoursWorked = 40;
console.log(
  "Employee #" +
    employee.employeeID +
    " worked " +
    employee.hoursWorked +
    " hours this week and earned " +
    employee.paycheck()
);

// Finally, lets write an employee contacy information method.

// The method will be named "contact" and will print the information to the console in this order:

// Employee #ID - Last Name, First Name , Phone: (###)-###-#### , Address: __________

employee.contact = function() {
  return (
    "Employee #" +
    this.employeeID +
    " - " +
    this.lastName +
    ", " +
    this.firstName +
    " , Phone: (" +
    this.phone.toString().slice(0, 3) +
    ")-" +
    this.phone.toString().slice(3, 6) +
    "-" +
    this.phone.toString().slice(6, 10) +
    " , Address: " +
    this.address
  );
};

// Now we can invoke this method and print its return statement to the console:
console.log(employee.contact());

///////////////////////// Exercises /////////////////////////
//1. Create a new object representing a pizza place's customer with the following properties: customerName(string), orderID(number), order(string), orderTotal(number), payed(boolean)
// assign appropriate values to each of the object's properties
//2. Declare a new method named printOrder that returns the object's properties in this format: "Order #(Customer ID goes here): (order goes here) = (order total goes here)"
//3. Invoke the method and print it to the console
//4. Declare a new method called "pay" that changes the value of the payed boolean property to True
//5. Declare a new method called "receipt" that uses a conditional to check if the customer has payed, and if so, and returns "(Customer Name) payed (order total) for order #(orderID)"
// If the customer has not payed, the method should return "Awaiting customer payment for order #(order ID)"
//6. Call the receipt method before calling the pay method to ensure the else statement is executed when necessary.

              
            
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