JavaScript Object

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1. Write a JavaScript program to list the properties of a JavaScript object. Sample object: var student = { name : "David Rayy", sclass : "VI", rollno : 12 }; Sample Output: name,sclass,rollno Click me to see the solution

2. Write a JavaScript program to delete the rollno property from the following object. Also print the object before or after deleting the property. Sample object: var student = { name : "David Rayy", sclass : "VI", rollno : 12 }; Click me to see the solution

3. Write a JavaScript program to get the length of a JavaScript object. Sample object : var student = { name : "David Rayy", sclass : "VI", rollno : 12 }; Click me to see the solution

4. Write a JavaScript program to display the reading status (i.e. display book name, author name and reading status) of the following books.

Click me to see the solution

5. Write a JavaScript program to get the volume of a cylindrical with four decimal places using object classes. Volume of a cylinder : V = πr2h where r is the radius and h is the height of the cylinder. Click me to see the solution

6. Write a bubble sort algorithm in JavaScript. Note : Bubble sort is a simple sorting algorithm that works by repeatedly stepping through the list to be sorted, Sample Data: [6,4,0, 3,-2,1] Expected Output : [-2, 0, 1, 3, 4, 6] Click me to see the solution

7. Write a JavaScript program that returns a subset of a string. Sample Data: dog Expected Output: ["d", "do", "dog", "o", "og", "g"] Click me to see the solution

8. Write a JavaScript program to create a clock. Note: The output will come every second. Expected Console Output : "14:37:42" "14:37:43" "14:37:44" "14:37:45" "14:37:46" "14:37:47" Click me to see the solution

9. Write a JavaScript program to calculate circle area and perimeter. Note : Create two methods to calculate the area and perimeter. The radius of the circle will be supplied by the user. Click me to see the solution

10. Write a JavaScript program to sort an array of JavaScript objects. Sample Object :

Expected Output:

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11. Write a JavaScript function to print all the methods in a JavaScript object. Test Data : console.log(all_properties(Array)); ["length", "name", "arguments", "caller", "prototype", "isArray", "observe", "unobserve"] Click me to see the solution

12. Write a JavaScript function to parse an URL. Click me to see the solution

13. Write a JavaScript function to retrieve all the names of an object's own and inherited properties. Click me to see the solution

14. Write a JavaScript function to retrieve all the values of an object's properties. Click me to see the solution

15. Write a JavaScript function to convert an object into a list of `[key, value]` pairs. Click me to see the solution

16. Write a JavaScript function to get a copy of the object where the keys become the values and the values are the keys. Click me to see the solution

17. Write a JavaScript function to check whether an object contains a given property. Click me to see the solution

18. Write a JavaScript function to check whether a given value is a DOM element. Click me to see the solution

More to Come !

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