Add yacht exercise

config.json

@@ -758,6 +758,14 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 8
+      },
+      {
+        "slug": "yacht",
+        "name": "Yacht",
+        "uuid": "67c5ced9-9664-4b9f-a33e-d37f7341cc16",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 4
       }
     ]
   },

exercises/practice/yacht/.docs/instructions.md

@@ -0,0 +1,30 @@
+# Instructions
+
+Given five dice and a category, calculate the score of the dice for that category.
+
+~~~~exercism/note
+You'll always be presented with five dice.
+Each dice's value will be between one and six inclusively.
+The dice may be unordered.
+~~~~
+
+## 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.

exercises/practice/yacht/.docs/introduction.md

@@ -0,0 +1,11 @@
+# Introduction
+
+Each year, something new is "all the rage" in your high school.
+This year it is a dice game: [Yacht][yacht].
+
+The game of Yacht is from the same family as Poker Dice, Generala and particularly Yahtzee, of which it is a precursor.
+The game consists of twelve rounds.
+In each, five dice are rolled and the player chooses one of twelve categories.
+The chosen category is then used to score the throw of the dice.
+
+[yacht]: https://en.wikipedia.org/wiki/Yacht_(dice_game)

exercises/practice/yacht/.meta/config.json

@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "kahgoh"
+  ],
+  "files": {
+    "solution": [
+      "yacht.v"
+    ],
+    "test": [
+      "run_test.v"
+    ],
+    "example": [
+      ".meta/example.v"
+    ]
+  },
+  "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)"
+}

exercises/practice/yacht/.meta/example.v

@@ -0,0 +1,96 @@
+module main
+
+import arrays
+
+enum Category as u8 {
+	yacht
+	ones
+	twos
+	threes
+	fours
+	fives
+	sixes
+	full_house
+	four_of_a_kind
+	little_straight
+	big_straight
+	choice
+}
+
+fn score(category Category, rolls []u8) int {
+	return match category {
+		.yacht { score_yacht(rolls) }
+		.ones { score_num(rolls, 1) }
+		.twos { score_num(rolls, 2) }
+		.threes { score_num(rolls, 3) }
+		.fours { score_num(rolls, 4) }
+		.fives { score_num(rolls, 5) }
+		.sixes { score_num(rolls, 6) }
+		.full_house { score_full_house(rolls) }
+		.four_of_a_kind { score_four_of_a_kind(rolls) }
+		.little_straight { score_ordered_matches(rolls, [u8(1), 2, 3, 4, 5]) }
+		.big_straight { score_ordered_matches(rolls, [u8(2), 3, 4, 5, 6]) }
+		.choice { sum(rolls) }
+	}
+}
+
+fn score_yacht(rolls []u8) int {
+	unique := arrays.uniq(rolls)
+	if (unique.len > 1) {
+		return 0
+	}
+	return 50
+}
+
+fn score_num(rolls []u8, req u8) int {
+	mut score := 0
+	for r in rolls {
+		if r == req {
+			score += r
+		}
+	}
+	return score
+}
+
+fn score_full_house(rolls []u8) int {
+	roll_counts := counts(rolls).values()
+	if roll_counts != [u8(2), 3] && roll_counts != [u8(3), 2] {
+		return 0
+	}
+
+	return sum(rolls)
+}
+
+fn score_four_of_a_kind(rolls []u8) int {
+	mut score := 0
+	roll_counts := counts(rolls)
+	for n, count in roll_counts {
+		if count >= 4 {
+			score += 4 * n
+		}
+	}
+	return score
+}
+
+fn score_ordered_matches(rolls []u8, req []u8) int {
+	if rolls.sorted() != req {
+		return 0
+	}
+	return 30
+}
+
+fn sum(nums []u8) int {
+	mut sum := 0
+	for n in nums {
+		sum += n
+	}
+	return sum
+}
+
+fn counts(rolls []u8) map[u8]u8 {
+	mut counts := map[u8]u8{}
+	for r in rolls {
+		counts[r] += 1
+	}
+	return counts
+}

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"

exercises/practice/yacht/run_test.v

@@ -0,0 +1,117 @@
+module main
+
+fn test_yacht() {
+	assert score(Category.yacht, [u8(5), 5, 5, 5, 5]) == 50
+}
+
+fn test_not_yacht() {
+	assert score(Category.yacht, [u8(1), 3, 3, 2, 5]) == 0
+}
+
+fn test_ones() {
+	assert score(Category.ones, [u8(1), 1, 1, 3, 5]) == 3
+}
+
+fn test_ones_out_of_order() {
+	assert score(Category.ones, [u8(3), 1, 1, 5, 1]) == 3
+}
+
+fn test_no_ones() {
+	assert score(Category.ones, [u8(4), 3, 6, 5, 5]) == 0
+}
+
+fn test_twos() {
+	assert score(Category.twos, [u8(2), 3, 4, 5, 6]) == 2
+}
+
+fn test_fours() {
+	assert score(Category.fours, [u8(1), 4, 1, 4, 1]) == 8
+}
+
+fn test_yacht_counted_as_threes() {
+	assert score(Category.threes, [u8(3), 3, 3, 3, 3]) == 15
+}
+
+fn test_yacht_of_3s_counted_as_fives() {
+	assert score(Category.fives, [u8(3), 3, 3, 3, 3]) == 0
+}
+
+fn test_fives() {
+	assert score(Category.fives, [u8(1), 5, 3, 5, 3]) == 10
+}
+
+fn test_sixes() {
+	assert score(Category.sixes, [u8(2), 3, 4, 5, 6]) == 6
+}
+
+fn test_full_house_two_small_three_big() {
+	assert score(Category.full_house, [u8(2), 2, 4, 4, 4]) == 16
+}
+
+fn test_full_house_three_small_two_big() {
+	assert score(Category.full_house, [u8(5), 3, 3, 5, 3]) == 19
+}
+
+fn test_two_pair_is_not_a_full_house() {
+	assert score(Category.full_house, [u8(2), 2, 4, 4, 5]) == 0
+}
+
+fn test_four_of_a_kind_is_not_a_full_house() {
+	assert score(Category.full_house, [u8(1), 4, 4, 4, 4]) == 0
+}
+
+fn test_yacht_is_not_a_full_house() {
+	assert score(Category.full_house, [u8(2), 2, 2, 2, 2]) == 0
+}
+
+fn test_four_of_a_kind() {
+	assert score(Category.four_of_a_kind, [u8(6), 6, 4, 6, 6]) == 24
+}
+
+fn test_yacht_can_be_scored_as_four_of_a_kind() {
+	assert score(Category.four_of_a_kind, [u8(3), 3, 3, 3, 3]) == 12
+}
+
+fn test_full_house_is_not_four_of_a_kind() {
+	assert score(Category.four_of_a_kind, [u8(3), 3, 3, 5, 5]) == 0
+}
+
+fn test_little_straight() {
+	assert score(Category.little_straight, [u8(3), 5, 4, 1, 2]) == 30
+}
+
+fn test_little_straight_as_big_straight() {
+	assert score(Category.big_straight, [u8(1), 2, 3, 4, 5]) == 0
+}
+
+fn test_four_in_order_but_not_a_little_straight() {
+	assert score(Category.little_straight, [u8(1), 1, 2, 3, 4]) == 0
+}
+
+fn test_no_pairs_but_not_a_little_straight() {
+	assert score(Category.little_straight, [u8(1), 2, 3, 4, 6]) == 0
+}
+
+fn test_minimum_is_1_maximum_is_5_but_not_a_little_straight() {
+	assert score(Category.little_straight, [u8(1), 1, 3, 4, 5]) == 0
+}
+
+fn test_big_straight() {
+	assert score(Category.big_straight, [u8(4), 6, 2, 5, 3]) == 30
+}
+
+fn test_big_straight_as_little_straight() {
+	assert score(Category.little_straight, [u8(6), 5, 4, 3, 2]) == 0
+}
+
+fn test_no_pairs_but_not_a_big_straight() {
+	assert score(Category.big_straight, [u8(6), 5, 4, 3, 1]) == 0
+}
+
+fn test_choice() {
+	assert score(Category.choice, [u8(3), 3, 5, 6, 6]) == 23
+}
+
+fn test_yacht_as_choice() {
+	assert score(Category.choice, [u8(2), 2, 2, 2, 2]) == 10
+}