Updating arrays in state

Question 1

What can you put into state?

Answer 1

Arrays

Question 2

What should you do instead of mutating an array?

Answer 2

Create a new version of it and update the state to it

Question 3

Which syntax is used to create arrays with new items?

Answer 3

[…arr, newItem]

Question 4

Which methods can be used to create new arrays with filtered or transformed items?

Answer 4

filter() and map()

Question 5

What library can you use to keep your code concise?

Answer 5

Immer

Question 6

Fill in the blank: You can use _______ to create arrays with new items.

Answer 6

[…arr, newItem]

Question 7

True or False: You can directly mutate an array in state.

Answer 7

False