Old Elyse's Analytic Enchantments
10 Points
Instructions
Elyse, magician-to-be, continues her training. She will be given several decks of cards that she needs to perform her tricks. To make things a bit easier, she only uses the cards 1 to 10. She only has one of each card, there are no duplicates in her decks of cards.
In this exercise, use methods from Julia's Base library to analyse the contents of an array.
1. Determine if a card is present
Elyse wants to determine if a card is present in the deck -- in other words, if the deck contains a specific number.
julia> card = 3;
julia> has_card([2, 3, 4, 5], card)
true2. Find the position of a card
Elyse wants to know the position (index) of a card in the deck.
If the card is not in the deck, return nothing.
julia> card = 2;
julia> find_card([9, 7, 3, 2], card)
43. Determine if each card is even
Elyse wants to know if every card is even -- in other words, if each number in the deck is even.
julia> all_cards_even([2, 4, 6, 7])
false4. Check if the deck contains an odd-value card
Elyse wants to know if there is an odd number in the deck.
julia> any_odd_cards([3, 2, 6, 4, 8])
true5. Determine the position of the first card that is even
Elyse wants to know the position of the first card that is even.
If there are no even cards in the deck, return nothing.
julia> first_even_card_idx([5, 2, 3, 1])
26. Get the first odd card from the deck
Elyse wants to know the value of the first card that is odd.
If there are no odd cards in the deck, return nothing.
julia> first_odd_card([4, 2, 8, 7, 9])
7Old Elyse's Analytic Enchantments
10 Points
Instructions
Elyse, magician-to-be, continues her training. She will be given several decks of cards that she needs to perform her tricks. To make things a bit easier, she only uses the cards 1 to 10. She only has one of each card, there are no duplicates in her decks of cards.
In this exercise, use methods from Julia's Base library to analyse the contents of an array.
1. Determine if a card is present
Elyse wants to determine if a card is present in the deck -- in other words, if the deck contains a specific number.
julia> card = 3;
julia> has_card([2, 3, 4, 5], card)
true2. Find the position of a card
Elyse wants to know the position (index) of a card in the deck.
If the card is not in the deck, return nothing.
julia> card = 2;
julia> find_card([9, 7, 3, 2], card)
43. Determine if each card is even
Elyse wants to know if every card is even -- in other words, if each number in the deck is even.
julia> all_cards_even([2, 4, 6, 7])
false4. Check if the deck contains an odd-value card
Elyse wants to know if there is an odd number in the deck.
julia> any_odd_cards([3, 2, 6, 4, 8])
true5. Determine the position of the first card that is even
Elyse wants to know the position of the first card that is even.
If there are no even cards in the deck, return nothing.
julia> first_even_card_idx([5, 2, 3, 1])
26. Get the first odd card from the deck
Elyse wants to know the value of the first card that is odd.
If there are no odd cards in the deck, return nothing.
julia> first_odd_card([4, 2, 8, 7, 9])
7