Elyses Enchantments
10 Points
vectors
Instructions
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 so her stack of cards can be represented by a vector of numbers. The position of a certain card corresponds to the index in the vector.
1. Retrieve a card from a stack
To pick a card, return the card at index position from the given stack.
julia> stack = [1, 2, 4, 1];
julia> position = 3;
julia> get_item(stack, position)
42. Exchange a card in the stack
Perform some sleight of hand and exchange the card at index position with the replacement card provided.
Return the adjusted stack.
julia> stack = [1, 2, 4, 1];
julia> position = 3;
julia> replacement_card = 6;
julia> set_item!(stack, position, replacement_card)
[1, 2, 6, 1]3. Insert a card at the top of the stack
Make a card appear by inserting a new card at the top of the stack. Return the adjusted stack.
julia> stack = [5, 9, 7, 1];
julia> new_card = 8;
julia> insert_item_at_top!(stack, new_card)
[5, 9, 7, 1, 8]4. Remove a card from the stack
Make a card disappear by removing the card at the given position from the stack.
Return the adjusted stack.
julia> stack = [3, 2, 6, 4, 8];
julia> position = 3;
julia> remove_item!(stack, position)
[3, 2, 4, 8]5. Remove the top card from the stack
Make a card disappear by removing the card at the top of the stack. Return the adjusted stack.
julia> stack = [3, 2, 6, 4, 8];
julia> remove_item_from_top!(stack)
[3, 2, 6, 4]6. Insert a card at the bottom of the stack
Make a card appear by inserting a new card at the bottom of the stack. Return the adjusted stack.
julia> stack = [5, 9, 7, 1];
julia> new_card = 8;
julia> insert_item_at_bottom!(stack, new_card)
[8, 5, 9, 7, 1]7. Remove a card from the bottom of the stack
Make a card disappear by removing the card at the bottom of the stack. Return the adjusted stack.
julia> stack = [8, 5, 9, 7, 1];
julia> remove_item_at_bottom!(stack)
[5, 9, 7, 1]8. Check the size of the stack
Check whether the size of the stack is equal to stack_size or not.
julia> stack = [3, 2, 6, 4, 8];
julia> stack_size = 4;
julia> check_size_of_stack(stack, stack_size)
falseElyses Enchantments
10 Points
vectors
Instructions
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 so her stack of cards can be represented by a vector of numbers. The position of a certain card corresponds to the index in the vector.
1. Retrieve a card from a stack
To pick a card, return the card at index position from the given stack.
julia> stack = [1, 2, 4, 1];
julia> position = 3;
julia> get_item(stack, position)
42. Exchange a card in the stack
Perform some sleight of hand and exchange the card at index position with the replacement card provided.
Return the adjusted stack.
julia> stack = [1, 2, 4, 1];
julia> position = 3;
julia> replacement_card = 6;
julia> set_item!(stack, position, replacement_card)
[1, 2, 6, 1]3. Insert a card at the top of the stack
Make a card appear by inserting a new card at the top of the stack. Return the adjusted stack.
julia> stack = [5, 9, 7, 1];
julia> new_card = 8;
julia> insert_item_at_top!(stack, new_card)
[5, 9, 7, 1, 8]4. Remove a card from the stack
Make a card disappear by removing the card at the given position from the stack.
Return the adjusted stack.
julia> stack = [3, 2, 6, 4, 8];
julia> position = 3;
julia> remove_item!(stack, position)
[3, 2, 4, 8]5. Remove the top card from the stack
Make a card disappear by removing the card at the top of the stack. Return the adjusted stack.
julia> stack = [3, 2, 6, 4, 8];
julia> remove_item_from_top!(stack)
[3, 2, 6, 4]6. Insert a card at the bottom of the stack
Make a card appear by inserting a new card at the bottom of the stack. Return the adjusted stack.
julia> stack = [5, 9, 7, 1];
julia> new_card = 8;
julia> insert_item_at_bottom!(stack, new_card)
[8, 5, 9, 7, 1]7. Remove a card from the bottom of the stack
Make a card disappear by removing the card at the bottom of the stack. Return the adjusted stack.
julia> stack = [8, 5, 9, 7, 1];
julia> remove_item_at_bottom!(stack)
[5, 9, 7, 1]8. Check the size of the stack
Check whether the size of the stack is equal to stack_size or not.
julia> stack = [3, 2, 6, 4, 8];
julia> stack_size = 4;
julia> check_size_of_stack(stack, stack_size)
false