Instructions

You're a magician and you handle a deck of cards. In order to correctly execute your magic trick, you need to be able to move a card from one position to another position. That is, you need to be able to rearrange the deck. Naturally, you want to be able to move cards in both directions, and be able to say "from the top of the deck" or "from the bottom of the deck".

Create a function arrange that takes:

• an array (of length n) of items,
• a from position (whole number, -n <= from < n),
• and to position (whole number, -n <= to < n)

Positive numbers means that you move cards from the bottom of the deck (the left hand side) and negative numbers refer to starting at the top of the deck (the right hand side).

It returns a new array with the item moved from the position from to the position to:

const before = ['❤ A', '❤ 9', '❤ 3', '❤ 6', '♣ A']
const magics = arrange(before, 1, -2)
magics
// => ['❤ A', '❤ 3', '❤ 6', '❤ 9', '♣ A']
//                          ^--- has moved from position 1 to -2 (from the right side)

Create a second function rearrange that does the same thing, but mutates the original input array:

const before = ['❤ A', '❤ 3', '❤ 6', '❤ 9', '♣ A']
const magics = rearrange(before, 4, 0)
magics
// => ['♣ A', '❤ A', '❤ 3', '❤ 6', '❤ 9']
//      ^--- has moved from position 4 to 0
magics === before
// => true