JAVASCRIPT

JavaScript loop through object key, value

// `for...of` loop
for (const [key, value] of Object.entries(animals)) {
    console.log(`${key}: ${value}`);
}

// `forEach()` method

Object.entries(animals).forEach(([key, value]) => {
    console.log(`${key}: ${value}`)
});

javascript iterate through an object (key, value)

const obj = { foo: 'bar', baz: 42 };
Object.entries(obj).forEach(([key, value]) => console.log(`${key}: ${value}`)); // "foo: bar", "baz: 42"

loop key in object

const fruits = { apple: 28, orange: 17 }

for(key in fruits){
	console.log(key)
}

javascript loop over object entries

const object1 = {
  a: 'somestring',
  b: 42
};

for (const [key, value] of Object.entries(object1)) {
  console.log(`${key}: ${value}`);
}

// expected output:
// "a: somestring"
// "b: 42"

how to iterate over keys in object javascript

var p = {
    "p1": "value1",
    "p2": null,
    "p3": "value3"
};

for (var key in p) {
    if (p.hasOwnProperty(key)) {
        console.log(key + " -> " + p[key]);
    }
}

js loop through object keys

for (const value of Object.values(obj)) { }

Iterate Through the Keys of an Object

// Iterate Through the Keys of an Object

const usersObj = {
  Alan: {
    online: false,
  },
  Jeff: {
    online: true,
  },
  Sarah: {
    online: false,
  },
};

function countOnline(usersObj) {
  let count = 0;
  for (let user in usersObj) {
    if (usersObj[user].online === true) count++;
  }
  return count;
}

console.log(countOnline(usersObj));

How to loop through an object in JavaScript with the Object.keys() method

const population = {
  male: 4,
  female: 93,
  others: 10
};

let genders = Object.keys(population);

console.log(genders); // ["male","female","others"]

for ...in statement to iterate object keys

for (let user in obj) {
  if (obj[user].online === true) {
    //code
  }
}

Object.keys() Method to Loop Through an Object in JavaScript

const person = {
    first_name: 'Monica',
    last_name: 'Geller',
    phone: '915-996-9739',
    email: 'monica37@gmail.com',
    street: '495 Grove Street',
    city: 'New York',
    country: 'USA',
};

const keys = Object.keys(person);

console.log(keys);
// ['first_name', 'last_name', 'phone', 'email', 'street', 'city', 'country'];

javascript loop object key value

// test code

javascript loop object key value

setUsers = function(data) {     
   // loop and init user    
}

Iterate Through the Keys of an Object with a for...in Statement

let users = {
  Alan: {
    age: 27,
    online: true
  },
  Jeff: {
    age: 32,
    online: true
  },
  Sarah: {
    age: 48,
    online: true
  },
  Ryan: {
    age: 19,
    online: true
  }
};

function isEveryoneHere(userObj) {
  return ["Alan", "Jeff", "Sarah", "Ryan"].every(name =>
    userObj.hasOwnProperty(name)
  );
}