Array Drills 2
https://repl.it/@yourwebdevguy/Array-copying-I-drill
https://repl.it/@yourwebdevguy/Array-copying-II-drill
https://repl.it/@yourwebdevguy/Squares-with-map-drill
https://repl.it/@yourwebdevguy/Sort-drill
https://repl.it/@yourwebdevguy/Filter-drill
https://repl.it/@yourwebdevguy/Find-drill