object.keys values code example

Example 1: map through keys javascript

var myObject = { 'a': 1, 'b': 2, 'c': 3 };

Object.keys(myObject).map(function(key, index) {
  myObject[key] *= 2;
});

console.log(myObject);
// => { 'a': 2, 'b': 4, 'c': 6 }

Example 2: Return the Objects Keys and Values

const keysAndValues = (obj) => [Object.keys(obj), Object.values(obj)];

keysAndValues({a: 1, b: 2, c: 3}); 
//➞ [["a", "b", "c"], [1, 2, 3]]

keysAndValues({a: "Dell", b: "Microsoft", c: "Google"}));
//➞ [["a", "b", "c"], ["Dell", "Microsoft", "Google"]]

keysAndValues({key1: true, key2: false, key3: undefined});
// ➞ [["key1", "key2", "key3"], [true, false, undefined]]

Example 3: javascript object get value by key

const person = {
  name: 'Bob',
  age: 47
}

Object.keys(person).forEach((key) => {
  console.log(person[key]); // 'Bob', 47
});

Example 4: object keys javascript

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

console.log(Object.keys(object1));
// expected output: Array ["a", "b", "c"]

Example 5: js object keys

var myObj = {no:'u',my:'sql'}
var keys = Object.keys(myObj);//returnes the array ['no','my'];