blarfoon

const myObject = {};

Object.defineProperty(myObject, "hi", {
  value: "mom",
  writable: true, // default: false
  enumerable: true, // default: false
  configurable: true, // default: false
});

console.log(myObject.hi); // > mom

blarfoon

const myObject = {
  hi: "mom",
  hello: "world",
};

const keys = Object.getOwnPropertyNames(myObject);

keys.forEach((key) => {
  const value = myObject[k];
  console.log(k, value);

blarfoon

const myObject = {
  hi: "mom",
  hello: "world",
};

const keys = Object.keys(myObject);

keys.forEach((key) => {
  const value = myObject[k];
  console.log(k, value);

blarfoon

const myObject = {
  hi: "mom",
  hello: "world",
}

for (const k in myObject) {
  if(myObject.hasOwnProperty(k)) {
    const value = myObject[k];
    console.log(k, value);
  }

blarfoon

const myObject = {
  hi: "mom",
};

console.log(myObject.hi);

// Or

console.log(myObject["hi"]);

blarfoon

const myObject = {}; // or new Object()

myObject.hi = "mom";

// Or

myObject["hi"] = "mom";

// Or

blarfoon

const myObject = {
  hi: "mom",
}

blarfoon

const myFirstObject = {};
const mySecondObject = myFirstObject;

mySecondObject.hi = "mom";

console.log(myFirstObject); // > {hi: "mom"}
console.log(mySecondObject); // > {hi: "mom"}
console.log(myFirstObject === mySecondObject); // > true

blarfoon

function areEqualDeep(a, b) {
  if (typeof a == "object" && a != null && typeof b == "object" && b != null) {
    const count = [0, 0];
    for (const key in a) count[0]++;
    for (const key in b) count[1]++;
    if (count[0] - count[1] != 0) {
      return false;
    }
    for (const key in a) {
      if (!(key in b) || !areEqualDeep(a[key], b[key])) {

blarfoon

function areEqualShallow(a, b) {
  for (const key in a) {
    if (!(key in b) || a[key] !== b[key]) {
      return false;
    }
  }
  for (const key in b) {
    if (!(key in a) || a[key] !== b[key]) {
      return false;
    }