anthonymjimenez

const instance = new Trip(["Boston", "Salem"], 600, 6);

console.log(instance.durationInHours()) // => 144 hours 
console.log(instance.destination.durationInHours()) // TypeError:
                                    // instance.destination.durationInHours is not a function

anthonymjimenez

class Trip {
  constructor(destination, budget, passports) {
    this.destination = destination;
    (this.budget = budget), (this.duration = 6);
  }

  durationInHours() {
    return `${24 * this.duration} hours`
  }
}

anthonymjimenez

let myTrip = {
    location: "Boston",
    budget: 600,
    passports: true
}

Object.defineProperty(myTrip, 'passports', {configurable: false} )


function deleteProperty(object, property) {

anthonymjimenez

const myTrip = {
    location: "Boston",
    budget: 600,
    duration: function(arg) { return arg }
}

function deleteProperty(object, property) {
    return delete object[property]
}

anthonymjimenez

const hello = 'hello'
goodbye = 'goodbye'

console.log(delete hello) // false
console.log(delete goodbye) // true


console.log(hello, goodbye=undefined) // hello undefined

anthonymjimenez

const myTrip = {
    location: "Boston",
    budget: 600,
    duration: function(arg) { return arg }
}

function deleteProperty(object, property) {
    return delete object[property]
}

anthonymjimenez

function locateGrade(objStudent, error) {
  let student = objStudent.student;
  if (!student) return error.error_message;
  const quiz_grades =
    student.quiz_grades !== undefined ? student.quiz_grades : [0, 0, 0];
  const test_grades =
    objStudent.student.test_grades !== undefined ? student.test_grades : [0, 0];
  const extra_credit =
    student.extraCredit !== undefined ? student.extra_credit : 0;
  return [...quiz_grades, ...test_grades, extra_credit];

anthonymjimenez

const error = {
    error_message: "Student not found",
  };
  
const objStudent = {
  student: {
    name: "Anthony",
    quiz_grades: [10, 9, 7],
    test_grades: [7, 8],
    extra_credit: undefined,

anthonymjimenez

let nestObject = {
  arrayOfObjects: [
    {
      one: 1,
      two: 2,
      three: 3,
    },
    {
      restOfNumbers: [{four: 4}, {five: 5}, 6, 7, 8, 9, 10],
    },

anthonymjimenez

let numbers = { numbers: { one: 1 } };

const {
  numbers: { one },
} = numbers;

console.log(one); // 1

const {
  numbers: { one: numberOne },