javascript object keys foreach

1const obj = {
2  name: 'Jean-Luc Picard',
3  rank: 'Captain'
4};
5
6// Prints "name Jean-Luc Picard" followed by "rank Captain"
7Object.keys(obj).forEach(key => {
8  console.log(key, obj[key]);
9});

1var person={
2 	first_name:"johnny",
3  	last_name: "johnson",
4	phone:"703-3424-1111"
5};
6for (var property in person) {
7  	console.log(property,":",person[property]);
8}

1const object1 = {
2  a: 'somestring',
3  b: 42
4};
5
6for (const [key, value] of Object.entries(object1)) {
7  console.log(`${key}: ${value}`);
8}

1const object1 = {
2  a: 'somestring',
3  b: 42,
4  c: false
5};
6
7console.log(Object.keys(object1));
8// expected output: Array ["a", "b", "c"]

1const obj = {
2  a: "aa",
3  b: "bb",
4  c: "cc",
5};
6//This for loop will loop through all keys in the object.
7// You can get the value by calling the key on the object with "[]"
8for(let key in obj) {
9  console.log(key);
10  console.log(obj[key]);
11}
12
13//This will return the following:
14// a
15// aa
16// b
17// bb
18// c
19// cc

1var lunch = {
2	sandwich: 'ham',
3	snack: 'chips',
4	drink: 'soda',
5	desert: 'cookie',
6	guests: 3,
7	alcohol: false,
8};
9
10Object.keys(lunch).forEach(function (item) {
11	console.log(item); // key
12	console.log(lunch[item]); // value
13});
14
15// returns "sandwich", "ham", "snack", "chips", "drink", "soda", "desert", "cookie", "guests", 3, "alcohol", false
16