Remove Array Duplicates using ES6 Set. Convert it back to an array using Array.from

When we need to copy an array, we often times used slice. But with ES6, you can also use the spread operator to duplicate an array.

Convert a string to an array of characters using the spread syntax!

There are 2 types of array cloning, shallow & deep. Shallow copies only cover the 1st level of the array and the rest are referenced.

Cheatsheet to show you the ways to write and work around arrow functions.