Elyses Destructured Enchantments
10 Points
sequential-destructuring
Instructions
Elyse, magician-to-be, continues her training. She has a deck of cards she wants to manipulate.
To make things easier, she usually only starts with cards numbered 1 to 10, although some of the tricks may involve additional cards.
1. Get the first card
Elyse will summon the first card in the deck, without using its index or first. It's just like magic.
(def deck [5 9 7 1 8])
(first-card deck)
;=> 52. Get the second card
Elyse performs sleight of hand, and summons the second card in the deck, without using its index or second.
(def deck [3 2 10 6 7])
(second-card deck)
;=> 23. Swap the first two cards
Elyse will make the top two cards of the deck switch places.
(def deck [10 7 3 8 5])
(swap-top-two-cards deck)
;=> [7 10 3 8 5]4. Discard the top card
Elyse will separate the deck into two piles. The first pile will contain only the top card of the original deck, while the second pile will contain all the other cards.
(def deck [2 5 4 9 3])
(discard-top-card deck)
;=> [2 [5 4 9 3]]5. Insert face cards
Elyse will insert a set of face cards (i.e. jack, queen, and king) into her deck such that they become the second, third, and fourth cards respectively.
(def deck [5 4 7 10])
(insert-face-cards deck)
;=> [5 "jack" "queen" "king" 4 7 10]Elyses Destructured Enchantments
10 Points
sequential-destructuring
Instructions
Elyse, magician-to-be, continues her training. She has a deck of cards she wants to manipulate.
To make things easier, she usually only starts with cards numbered 1 to 10, although some of the tricks may involve additional cards.
1. Get the first card
Elyse will summon the first card in the deck, without using its index or first. It's just like magic.
(def deck [5 9 7 1 8])
(first-card deck)
;=> 52. Get the second card
Elyse performs sleight of hand, and summons the second card in the deck, without using its index or second.
(def deck [3 2 10 6 7])
(second-card deck)
;=> 23. Swap the first two cards
Elyse will make the top two cards of the deck switch places.
(def deck [10 7 3 8 5])
(swap-top-two-cards deck)
;=> [7 10 3 8 5]4. Discard the top card
Elyse will separate the deck into two piles. The first pile will contain only the top card of the original deck, while the second pile will contain all the other cards.
(def deck [2 5 4 9 3])
(discard-top-card deck)
;=> [2 [5 4 9 3]]5. Insert face cards
Elyse will insert a set of face cards (i.e. jack, queen, and king) into her deck such that they become the second, third, and fourth cards respectively.
(def deck [5 4 7 10])
(insert-face-cards deck)
;=> [5 "jack" "queen" "king" 4 7 10]