javascript iterate on object code example

Example 1: iterate object javascript

let obj = {
	key1: "value1",
	key2: "value2",
	key3: "value3",
	key4: "value4",
}
Object.entries(obj).forEach(([key, value]) => {
	console.log(key, value);
});

Example 2: javascript loop through object example

var person={
 	first_name:"johnny",
  	last_name: "johnson",
	phone:"703-3424-1111"
};
for (var property in person) {
  	console.log(property,":",person[property]);
}

Example 3: foreach object js

const object1 = {
  a: 'somestring',
  b: 42
};
for (let [key, value] of Object.entries(object1)) {
  console.log(`${key}: ${value}`);
}
// expected output:
// "a: somestring"
// "b: 42"
// order is not guaranteed

Example 4: javascript iterate object

const person = {
	firstName: 'John',
	lastName: 'Doe',
  	email: '[email protected]'
};
for (const [key, value] of Object.entries(person)) {
	console.log(`${key}: ${value}`);
}

/*
	Explanation - 
    Object.entries(person) returns: [["firstName","John"],["lastName","Doe"],["email","[email protected]"]]
    We can use an ES6 'for-of' loop to interate over it. Each iteration gets an 
    array where the 0th index is the property name and the 1st index is the 
    value. We can use ES6 array destructuring to directly extract the values
    into separate variables.
*/

Example 5: javascript iterate object

const obj = { 0: 'a', 1: 'b', 2: 'c' };
console.log(Object.entries(obj)); // => [ ['0', 'a'], ['1', 'b'], ['2', 'c'] ]

Object.entries(obj).forEach((key, value) => {
  console.log(key + ' ' + value);
});

Example 6: iterate object js

for (let key in yourobject) {
   if (yourobject.hasOwnProperty(key)) {
      console.log(key, yourobject[key]);
   }
}