creating arrays drill: https://repl.it/@jpegzilla/Creating-arrays-drill
adding array items drill: https://repl.it/@jpegzilla/Adding-array-items-drills
accessing array items drill: https://repl.it/@jpegzilla/Accessing-array-items-drill
array length and access drill: https://repl.it/@jpegzilla/Array-length-and-access-drill
array copying I drill: https://repl.it/@jpegzilla/Array-copying-I-drill
array copying II drill: https://repl.it/@jpegzilla/Array-copying-II-drill
squares with map drill: https://repl.it/@jpegzilla/Squares-with-map-drill
sort drill: https://repl.it/@jpegzilla/Sort-drill
filter drill: https://repl.it/@jpegzilla/Filter-drill
find drill: https://repl.it/@jpegzilla/Find-drill