Modern JavaScript from the Beginning - Second Edition - Sets

This video tutorial introduces sets in JavaScript, a data structure that stores unique values without order. It covers creating sets, adding and checking membership, removing elements, and converting sets to arrays. The tutorial also explains iterating over sets and clearing them, providing practical examples and code snippets. The video concludes with a brief mention of maps, which will be covered in the next tutorial.

What is a key characteristic of a JavaScript Set?

• It maintains the order of elements.

• It is a type of array.

• It allows duplicate values.

• It stores unique values only.

How can you add an element to a Set?

• Using the append method.

• Using the add method.

• Using the push method.

• Using the insert method.

Which method checks if a Set contains a specific element?

• includes

• contains

• has

• exists

What happens when you try to delete an element from a Set?

• The element is removed if it exists.

• The Set is cleared.

• An error is thrown.

• The Set is converted to an array.

How can you convert a Set to an Array?

• Using convert method.

• Using toArray method.

• Using map method.

• Using Array.from method.

Which loop can be used to iterate over a Set?

• forEach loop

• while loop

• do while loop

• for of loop

What does the clear method do to a Set?

• Adds a new element to the Set.

• Removes a specific element.

• Converts the Set to an array.

• Removes all elements from the Set.