Spread Operators with Arrays

spreadArray.js

// spread operators allows any iterable to be expanded
// it can serve as a means of adding arrays (concatenation)
const arr1 = [1, 3, 4]
const arr2 = [10, 13, 5]
const bothArr = [...arr1, ...arr2]

// you can use this to update an array with
// another array without leading to a multidimensional array
let arr1 = [1, 3, 4]
const arr2 = [10, 13, 5]
arr1 = [...arr1, ...arr2, "Hello"]
// changes to arr2 at this point will not affect arr1

// it can as well be used to copy an array without referencing
const arr1 = [1, 3, 4]
const arr2 = [...arr1]
// arr2 is not referencing arr1 i.e changes to arr1
// after line 16 will not affect  arr2 and vice versa, but this is not the case below
const arr1 = [1, 3, 4]
const arr2 = [arr1] // or simply arr2 = arr1
arr1.push(6) // will reflect in arr2
arr2.push(3) // will reflecg in arr1

// copying multidimensional arrays is not recommended with spread operators 
// because spread operator goes one step level deep while copying array
const arr1 = [[1,2], [2,3], [3,4]]
const arr2 = [...arr1]
arr2.pop().pop() // will reflect on arr1 which isn't what we want
 
// make your corrections, suggestions, observations below