Nested Data Structures

Question 1

Array shallow copy method

Answer 1

array.slice() or you can use […array]

Question 2

Object shallow copy

Answer 2

Object.assign({}, obj)

Question 3

Deep copy with plain objects (any object, including arrays, that only has primitives, arrays, and plain objects as elements.)

Answer 3

let serializedArr = JSON.stringify(arr);
let deepCopiedArr = JSON.parse(serializedArr);

Question 4

Deep copy with objects

Answer 4

let deepCopy = {};

for (const key in obj) {
deepCopy[key] = […obj[key]]
}