Nested Arrays & Hashes

Question

arr = [5, [9, 4, 6], [8]]
puts arr[1][0]

I can't figure out why the answer is 9.

Answer 1

You've got several arrays; in this case, arr[1][0] means you're accesing the first element of the second array.

Answer 2

0 1 2
0 5 N N
1 9 4 6
2 8 N N

see this

Answer 3

arr = [5, [9, 4, 6], [8]]

therefor arr[1] == [9, 4, 6], and from this list you take the first element ([0]), which is 9.

Answer 4

cars = {
edad: {daniel:16, leyra:15, josue:17},
ciudad: {daniel:"habana", leyra:"habana", josue:"habana"}
}

puts [:cars][:edad][:daniel]