javascript dictionary keys code example

Example 1: get keys of dictionary js

// Get keys of a dictionary
let dict = { a:1 , b:2 , c:3 }

console.log( Object.keys(dict) ) // expected output : ['a', 'b', 'c']

Example 2: object keys javascript

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

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

Example 3: object.keys javascript

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

console.log(Object.keys(object1));

Example 4: js key in dict

"key" in obj // true, regardless of the actual value

Example 5: js dictionary

var dict = {
  FirstName: "Chris",
  "one": 1,
  1: "some value"
};