exercises

Exercises#

Sample object:

var student = {
  name: "David Rayy",
  sclass: "VI",
  rollno: 12,
};

Sample Output:

name,sclass,rollno

Write a JavaScript program to delete the rollno property from the following object. Also print the object before and after deleting the property.

Sample object:

var student = {
  name: "David Rayy",
  sclass: "VI",
  rollno: 12,
};

Write a JavaScript program to get the length of a JavaScript object properties.
Write a JavaScript function to retrieve all the values of an object's properties. Sample object:

var country = {
  name: "France",
  capital: "Paris",
};

Sample Output:

["France", "Paris"];

Write a JavaScript function to check whether an object contains given property.
Write a JavaScript function to get a copy of the object where the keys have become the values and the values the keys.

Sample Object:

var colors = {
  red: "#FF0000",
  green: "#00FF00",
  white: "#FFFFFF",
};

Sample Output

{
  "#FF0000": "red",
  "#00FF00": "green",
  "#FFFFFF": "white"
}