diff --git a/config.json b/config.json index f49327a0..19327782 100644 --- a/config.json +++ b/config.json @@ -574,6 +574,14 @@ "practices": [], "prerequisites": [], "difficulty": 3 + }, + { + "slug": "yacht", + "name": "Yacht", + "uuid": "039e844c-da0b-4e3e-8910-c697429c2350", + "practices": [], + "prerequisites": [], + "difficulty": 1 } ] }, diff --git a/exercises/practice/yacht/.docs/instructions.md b/exercises/practice/yacht/.docs/instructions.md new file mode 100644 index 00000000..54fdb452 --- /dev/null +++ b/exercises/practice/yacht/.docs/instructions.md @@ -0,0 +1,35 @@ +# Instructions + +The dice game [Yacht][yacht] is from the same family as Poker Dice, Generala and particularly Yahtzee, of which it is a precursor. +In the game, five dice are rolled and the result can be entered in any of twelve categories. +The score of a throw of the dice depends on category chosen. + +## Scores in Yacht + +| Category | Score | Description | Example | +| --------------- | ---------------------- | ---------------------------------------- | ------------------- | +| Ones | 1 × number of ones | Any combination | 1 1 1 4 5 scores 3 | +| Twos | 2 × number of twos | Any combination | 2 2 3 4 5 scores 4 | +| Threes | 3 × number of threes | Any combination | 3 3 3 3 3 scores 15 | +| Fours | 4 × number of fours | Any combination | 1 2 3 3 5 scores 0 | +| Fives | 5 × number of fives | Any combination | 5 1 5 2 5 scores 15 | +| Sixes | 6 × number of sixes | Any combination | 2 3 4 5 6 scores 6 | +| Full House | Total of the dice | Three of one number and two of another | 3 3 3 5 5 scores 19 | +| Four of a Kind | Total of the four dice | At least four dice showing the same face | 4 4 4 4 6 scores 16 | +| Little Straight | 30 points | 1-2-3-4-5 | 1 2 3 4 5 scores 30 | +| Big Straight | 30 points | 2-3-4-5-6 | 2 3 4 5 6 scores 30 | +| Choice | Sum of the dice | Any combination | 2 3 3 4 6 scores 18 | +| Yacht | 50 points | All five dice showing the same face | 4 4 4 4 4 scores 50 | + +If the dice do not satisfy the requirements of a category, the score is zero. +If, for example, _Four Of A Kind_ is entered in the _Yacht_ category, zero points are scored. +A _Yacht_ scores zero if entered in the _Full House_ category. + +## Task + +Given a list of values for five dice and a category, your solution should return the score of the dice for that category. +If the dice do not satisfy the requirements of the category your solution should return 0. +You can assume that five values will always be presented, and the value of each will be between one and six inclusively. +You should not assume that the dice are ordered. + +[yacht]: https://en.wikipedia.org/wiki/Yacht_(dice_game) diff --git a/exercises/practice/yacht/.meta/config.json b/exercises/practice/yacht/.meta/config.json new file mode 100644 index 00000000..0764a8ba --- /dev/null +++ b/exercises/practice/yacht/.meta/config.json @@ -0,0 +1,17 @@ +{ + "authors": ["blakelewis"], + "files": { + "solution": [ + "yacht.rkt" + ], + "test": [ + "yacht-test.rkt" + ], + "example": [ + ".meta/example.rkt" + ] + }, + "blurb": "Score a single throw of dice in the game Yacht.", + "source": "James Kilfiger, using wikipedia", + "source_url": "https://en.wikipedia.org/wiki/Yacht_(dice_game)" +} diff --git a/exercises/practice/yacht/.meta/example.rkt b/exercises/practice/yacht/.meta/example.rkt new file mode 100644 index 00000000..28a7e852 --- /dev/null +++ b/exercises/practice/yacht/.meta/example.rkt @@ -0,0 +1,52 @@ +#lang racket + +(provide yacht) + +(define (sum-of-dice value dice) + (* value (count (λ (d) (= d value)) dice))) + +(define (sorted-groups dice) + (sort (group-by identity dice) + (λ (x y) (> (length x) (length y))))) + +(define (full-house dice) + (let ([groups (sorted-groups dice)]) + (if (and (= (length groups) 2) + (= (length (car groups)) 3)) + (apply + dice) + 0))) + +(define (four-of-a-kind dice) + (let ([groups (sorted-groups dice)]) + (if (or (and (= (length groups) 2) + (= (length (car groups)) 4)) + (= (length groups) 1)) + (* 4 (car dice)) + 0))) + +(define (straight start dice) + (let ([groups (sorted-groups dice)]) + (if (and (= (length groups) 5) + (= (apply min dice) start) + (= (apply max dice) (+ start 4))) + 30 + 0))) + +(define (five-of-a-kind dice) + (if (= (length (sorted-groups dice)) 1) 50 0)) + +(define (yacht dice category) + (cond [(string=? category "ones") (sum-of-dice 1 dice)] + [(string=? category "twos") (sum-of-dice 2 dice)] + [(string=? category "threes") (sum-of-dice 3 dice)] + [(string=? category "fours") (sum-of-dice 4 dice)] + [(string=? category "fives") (sum-of-dice 5 dice)] + [(string=? category "sixes") (sum-of-dice 6 dice)] + [(string=? category "full house") (full-house dice)] + [(string=? category "four of a kind") (four-of-a-kind dice)] + [(string=? category "little straight") (straight 1 dice)] + [(string=? category "big straight") (straight 2 dice)] + [(string=? category "choice") (apply + dice)] + [(string=? category "yacht") (five-of-a-kind dice)] + [else (error "unknown category")])) + diff --git a/exercises/practice/yacht/.meta/tests.toml b/exercises/practice/yacht/.meta/tests.toml new file mode 100644 index 00000000..b9d92037 --- /dev/null +++ b/exercises/practice/yacht/.meta/tests.toml @@ -0,0 +1,97 @@ +# This is an auto-generated file. +# +# Regenerating this file via `configlet sync` will: +# - Recreate every `description` key/value pair +# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications +# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion) +# - Preserve any other key/value pair +# +# As user-added comments (using the # character) will be removed when this file +# is regenerated, comments can be added via a `comment` key. + +[3060e4a5-4063-4deb-a380-a630b43a84b6] +description = "Yacht" + +[15026df2-f567-482f-b4d5-5297d57769d9] +description = "Not Yacht" + +[36b6af0c-ca06-4666-97de-5d31213957a4] +description = "Ones" + +[023a07c8-6c6e-44d0-bc17-efc5e1b8205a] +description = "Ones, out of order" + +[7189afac-cccd-4a74-8182-1cb1f374e496] +description = "No ones" + +[793c4292-dd14-49c4-9707-6d9c56cee725] +description = "Twos" + +[dc41bceb-d0c5-4634-a734-c01b4233a0c6] +description = "Fours" + +[f6125417-5c8a-4bca-bc5b-b4b76d0d28c8] +description = "Yacht counted as threes" + +[464fc809-96ed-46e4-acb8-d44e302e9726] +description = "Yacht of 3s counted as fives" + +[d054227f-3a71-4565-a684-5c7e621ec1e9] +description = "Fives" + +[e8a036e0-9d21-443a-8b5f-e15a9e19a761] +description = "Sixes" + +[51cb26db-6b24-49af-a9ff-12f53b252eea] +description = "Full house two small, three big" + +[1822ca9d-f235-4447-b430-2e8cfc448f0c] +description = "Full house three small, two big" + +[b208a3fc-db2e-4363-a936-9e9a71e69c07] +description = "Two pair is not a full house" + +[b90209c3-5956-445b-8a0b-0ac8b906b1c2] +description = "Four of a kind is not a full house" + +[32a3f4ee-9142-4edf-ba70-6c0f96eb4b0c] +description = "Yacht is not a full house" + +[b286084d-0568-4460-844a-ba79d71d79c6] +description = "Four of a Kind" + +[f25c0c90-5397-4732-9779-b1e9b5f612ca] +description = "Yacht can be scored as Four of a Kind" + +[9f8ef4f0-72bb-401a-a871-cbad39c9cb08] +description = "Full house is not Four of a Kind" + +[b4743c82-1eb8-4a65-98f7-33ad126905cd] +description = "Little Straight" + +[7ac08422-41bf-459c-8187-a38a12d080bc] +description = "Little Straight as Big Straight" + +[97bde8f7-9058-43ea-9de7-0bc3ed6d3002] +description = "Four in order but not a little straight" + +[cef35ff9-9c5e-4fd2-ae95-6e4af5e95a99] +description = "No pairs but not a little straight" + +[fd785ad2-c060-4e45-81c6-ea2bbb781b9d] +description = "Minimum is 1, maximum is 5, but not a little straight" + +[35bd74a6-5cf6-431a-97a3-4f713663f467] +description = "Big Straight" + +[87c67e1e-3e87-4f3a-a9b1-62927822b250] +description = "Big Straight as little straight" + +[c1fa0a3a-40ba-4153-a42d-32bc34d2521e] +description = "No pairs but not a big straight" + +[207e7300-5d10-43e5-afdd-213e3ac8827d] +description = "Choice" + +[b524c0cf-32d2-4b40-8fb3-be3500f3f135] +description = "Yacht as choice" diff --git a/exercises/practice/yacht/yacht-test.rkt b/exercises/practice/yacht/yacht-test.rkt new file mode 100644 index 00000000..fb88157d --- /dev/null +++ b/exercises/practice/yacht/yacht-test.rkt @@ -0,0 +1,100 @@ +#lang racket/base + +(require "yacht.rkt") + +(module+ test + (require rackunit rackunit/text-ui)) + +(module+ test + (define suite + (test-suite + "yacht tests" + + (test-equal? "Yacht" + (yacht '(5 5 5 5 5) "yacht") 50) + + (test-equal? "Not Yacht" + (yacht '(1 3 3 2 5) "yacht") 0) + + (test-equal? "Ones" + (yacht '(1 1 1 3 5) "ones") 3) + + (test-equal? "Ones, out of order" + (yacht '(3 1 1 5 1) "ones") 3) + + (test-equal? "No ones" + (yacht '(4 3 6 5 5) "ones") 0) + + (test-equal? "Twos" + (yacht '(2 3 4 5 6) "twos") 2) + + (test-equal? "Fours" + (yacht '(1 4 1 4 1) "fours") 8) + + (test-equal? "Yacht counted as threes" + (yacht '(3 3 3 3 3) "threes") 15) + + (test-equal? "Yacht of 3s counted as fives" + (yacht '(3 3 3 3 3) "fives") 0) + + (test-equal? "Fives" + (yacht '(1 5 3 5 3) "fives") 10) + + (test-equal? "Sixes" + (yacht '(2 3 4 5 6) "sixes") 6) + + (test-equal? "Full house two small, three big" + (yacht '(2 2 4 4 4) "full house") 16) + + (test-equal? "Full house three small, two big" + (yacht '(5 3 3 5 3) "full house") 19) + + (test-equal? "Two pair is not a full house" + (yacht '(2 2 4 4 5) "full house") 0) + + (test-equal? "Four of a kind is not a full house" + (yacht '(1 4 4 4 4) "full house") 0) + + (test-equal? "Yacht is not a full house" + (yacht '(2 2 2 2 2) "full house") 0) + + (test-equal? "Four of a Kind" + (yacht '(6 6 4 6 6) "four of a kind") 24) + + (test-equal? "Yacht can be scored as Four of a Kind" + (yacht '(3 3 3 3 3) "four of a kind") 12) + + (test-equal? "Full house is not Four of a Kind" + (yacht '(3 3 3 5 5) "four of a kind") 0) + + (test-equal? "Little Straight" + (yacht '(3 5 4 1 2) "little straight") 30) + + (test-equal? "Little Straight as Big Straight" + (yacht '(1 2 3 4 5) "big straight") 0) + + (test-equal? "Four in order but not a little straight" + (yacht '(1 1 2 3 4) "little straight") 0) + + (test-equal? "No pairs but not a little straight" + (yacht '(1 2 3 4 6) "little straight") 0) + + (test-equal? "Minimum is 1, maximum is 5, but not a little straight" + (yacht '(1 1 3 4 5) "little straight") 0) + + (test-equal? "Big Straight" + (yacht '(4 6 2 5 3) "big straight") 30) + + (test-equal? "Big Straight as little straight" + (yacht '(6 5 4 3 2) "little straight") 0) + + (test-equal? "No pairs but not a big straight" + (yacht '(6 5 4 3 1) "big straight") 0) + + (test-equal? "Choice" + (yacht '(3 3 5 6 6) "choice") 23) + + (test-equal? "Yacht as choice" + (yacht '(2 2 2 2 2) "choice") 10))) + + (run-tests suite)) diff --git a/exercises/practice/yacht/yacht.rkt b/exercises/practice/yacht/yacht.rkt new file mode 100644 index 00000000..c31b4b73 --- /dev/null +++ b/exercises/practice/yacht/yacht.rkt @@ -0,0 +1,6 @@ +#lang racket + +(provide yacht) + +(define (yacht dice category) + (error "Not implemented yet"))