instructions.md

As a magician-to-be, Elyse needs to practice some basics. She has a stack of cards that she wants to manipulate.

To make things a bit easier she only uses the cards 1 to 10.

1. Retrieve a card from a stack

Return the card at position index from the given stack.

const index = 2
getItem([1, 2, 4, 1], index)
// => 4

2. Exchange a card in the stack

Exchange the card at position index with the new card provided and return the adjusted stack. Note that this will also change the input slice which is ok.

const index = 2
const newCard = 6
setItem([1, 2, 4, 1], index, newCard)
// => [1, 2, 6, 1]

3. Insert a card at the of top the stack

Insert new card at the top of the stack and return the stack.

const newCard = 8
insertItemAtTop([5, 9, 7, 1], newCard)
// => [5, 9, 7, 1, 8]

4. Remove a card from the stack

Remove the card at position index from the stack and return the stack.

const index = 2
removeItem([3, 2, 6, 4, 8], index)
// => [3, 2, 4, 8]

5. Remove the top card from the stack

Remove the card at the top of the stack and return the stack.

removeItemFromTop([3, 2, 6, 4, 8])
// => [3, 2, 6, 4]

6. Insert a card at the bottom of the stack

Insert new card at the bottom of the stack and return the stack.

const newCard = 8
insertItemAtBottom([5, 9, 7, 1], newCard)
// => [8, 5, 9, 7, 1]

7. Remove a card from the bottom of the stack

Remove the card at the bottom of the stack and return the stack.

removeItemAtBottom([8, 5, 9, 7, 1])
// => [5, 9, 7, 1]

8. Check size of the stack

Check whether the size of the stack is equal a given stackSize or not.

const stackSize = 4
checkSizeOfStack([3, 2, 6, 4, 8], stackSize)
// => false