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Add exercise (#884)
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‎config.json‎

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"prerequisites": [],
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"difficulty": 3
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},
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{
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"slug": "yacht",
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"name": "Yacht",
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"uuid": "b7909c33-071f-4d8d-806b-34ffcce5c415",
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"practices": [],
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"prerequisites": [],
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"difficulty": 3,
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"topics": [
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"higher-order-functions",
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"conditionals",
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"conditionals-switch"
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]
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},
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{
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"slug": "acronym",
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"name": "Acronym",

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

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# Instructions
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Given five dice and a category, calculate the score of the dice for that category.
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~~~~exercism/note
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You'll always be presented with five dice.
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Each dice's value will be between one and six inclusively.
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The dice may be unordered.
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~~~~
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## Scores in Yacht
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| Category | Score | Description | Example |
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| --------------- | ---------------------- | ---------------------------------------- | ------------------- |
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| Ones | 1 × number of ones | Any combination | 1 1 1 4 5 scores 3 |
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| Twos | 2 × number of twos | Any combination | 2 2 3 4 5 scores 4 |
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| Threes | 3 × number of threes | Any combination | 3 3 3 3 3 scores 15 |
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| Fours | 4 × number of fours | Any combination | 1 2 3 3 5 scores 0 |
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| Fives | 5 × number of fives | Any combination | 5 1 5 2 5 scores 15 |
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| Sixes | 6 × number of sixes | Any combination | 2 3 4 5 6 scores 6 |
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| Full House | Total of the dice | Three of one number and two of another | 3 3 3 5 5 scores 19 |
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| Four of a Kind | Total of the four dice | At least four dice showing the same face | 4 4 4 4 6 scores 16 |
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| Little Straight | 30 points | 1-2-3-4-5 | 1 2 3 4 5 scores 30 |
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| Big Straight | 30 points | 2-3-4-5-6 | 2 3 4 5 6 scores 30 |
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| Choice | Sum of the dice | Any combination | 2 3 3 4 6 scores 18 |
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| Yacht | 50 points | All five dice showing the same face | 4 4 4 4 4 scores 50 |
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If the dice do **not** satisfy the requirements of a category, the score is zero.
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If, for example, _Four Of A Kind_ is entered in the _Yacht_ category, zero points are scored.
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A _Yacht_ scores zero if entered in the _Full House_ category.

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

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

‎exercises/practice/yacht/.meta/Sources/Yacht/YachtExample.swift‎

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enum YachtCategory: String {
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case ones
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case twos
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case threes
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case fours
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case fives
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case sixes
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case fullHouse = "full house"
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case fourOfAKind = "four of a kind"
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case littleStraight = "little straight"
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case bigStraight = "big straight"
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case choice
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case yacht
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}
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func score(_ scores: [Int], category: YachtCategory) -> Int {
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switch category {
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case .ones: return simple(scores, category: 1)
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case .twos: return simple(scores, category: 2)
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case .threes: return simple(scores, category: 3)
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case .fours: return simple(scores, category: 4)
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case .fives: return simple(scores, category: 5)
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case .sixes: return simple(scores, category: 6)
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case .fullHouse: return fullHouse(scores)
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case .fourOfAKind: return fourOfAKind(scores)
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case .littleStraight: return littleStraight(scores)
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case .bigStraight: return bigStraight(scores)
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case .choice: return choice(scores)
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case .yacht: return yacht(scores)
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}
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}
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fileprivate func simple(_ scores: [Int], category: Int) -> Int {
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return category * scores.count { $0 == category }
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}
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fileprivate func fullHouse(_ scores: [Int]) -> Int {
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let counts = scores.reduce(into: [Int: Int]()) { result, element in
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result[element, default: 0] += 1
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}
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if counts.count == 2 && (counts.values.contains(2) && counts.values.contains(3)) {
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return scores.reduce(0, +)
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}
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return 0
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}
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fileprivate func fourOfAKind(_ scores: [Int]) -> Int {
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let counts = scores.reduce(into: [Int: Int]()) { result, element in
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result[element, default: 0] += 1
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}
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return counts.first { $0.value >= 4 }.map { $0.key * 4 } ?? 0
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}
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fileprivate func littleStraight(_ scores: [Int]) -> Int {
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return Set(scores) == [1, 2, 3, 4, 5] ? 30 : 0
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}
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fileprivate func bigStraight(_ scores: [Int]) -> Int {
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return Set(scores) == [2, 3, 4, 5, 6] ? 30 : 0
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}
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fileprivate func choice(_ scores: [Int]) -> Int {
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return scores.reduce(0, +)
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}
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fileprivate func yacht(_ scores: [Int]) -> Int {
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return scores.allSatisfy { $0 == scores.first } ? 50 : 0
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}

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

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{
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"authors": [
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"Sencudra"
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],
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"files": {
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"solution": [
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"Sources/Yacht/Yacht.swift"
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],
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"test": [
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"Tests/YachtTests/YachtTests.swift"
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],
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"example": [
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".meta/Sources/Yacht/YachtExample.swift"
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],
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"editor": [
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"Sources/Yacht/YachtCategory.swift"
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]
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},
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"blurb": "Score a single throw of dice in the game Yacht.",
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"source": "James Kilfiger, using Wikipedia",
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"source_url": "https://en.wikipedia.org/wiki/Yacht_(dice_game)"
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}

‎exercises/practice/yacht/.meta/template.swift‎

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import Testing
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import Foundation
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@testable import {{ exercise|camelCase }}
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let RUNALL = Bool(ProcessInfo.processInfo.environment["RUNALL", default: "false"]) ?? false
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@Suite struct {{ exercise|camelCase }}Tests {
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{% for case in cases %}
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{% if forloop.first -%}
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@Test("{{case.description}}")
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{% else -%}
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@Test("{{case.description}}", .enabled(if: RUNALL))
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{% endif -%}
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func test{{ case.description|camelCase }}() {
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#expect({{ case.property }}({{ case.input.dice }}, category: category("{{ case.input.category }}")) == {{case.expected}})
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}
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{% endfor -%}
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}
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func category(_ raw: String) -> YachtCategory {
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guard let category = YachtCategory(rawValue: raw) else {
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#expect(Bool(false), "Invalid test category: \(raw)")
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return .ones
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}
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return category
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}

‎exercises/practice/yacht/.meta/tests.toml‎

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# This is an auto-generated file.
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#
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# Regenerating this file via `configlet sync` will:
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# - Recreate every `description` key/value pair
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# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
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# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
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# - Preserve any other key/value pair
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#
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# As user-added comments (using the # character) will be removed when this file
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# is regenerated, comments can be added via a `comment` key.
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[3060e4a5-4063-4deb-a380-a630b43a84b6]
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description = "Yacht"
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[15026df2-f567-482f-b4d5-5297d57769d9]
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description = "Not Yacht"
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[36b6af0c-ca06-4666-97de-5d31213957a4]
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description = "Ones"
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[023a07c8-6c6e-44d0-bc17-efc5e1b8205a]
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description = "Ones, out of order"
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[7189afac-cccd-4a74-8182-1cb1f374e496]
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description = "No ones"
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[793c4292-dd14-49c4-9707-6d9c56cee725]
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description = "Twos"
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[dc41bceb-d0c5-4634-a734-c01b4233a0c6]
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description = "Fours"
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[f6125417-5c8a-4bca-bc5b-b4b76d0d28c8]
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description = "Yacht counted as threes"
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[464fc809-96ed-46e4-acb8-d44e302e9726]
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description = "Yacht of 3s counted as fives"
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[d054227f-3a71-4565-a684-5c7e621ec1e9]
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description = "Fives"
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[e8a036e0-9d21-443a-8b5f-e15a9e19a761]
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description = "Sixes"
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[51cb26db-6b24-49af-a9ff-12f53b252eea]
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description = "Full house two small, three big"
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[1822ca9d-f235-4447-b430-2e8cfc448f0c]
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description = "Full house three small, two big"
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[b208a3fc-db2e-4363-a936-9e9a71e69c07]
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description = "Two pair is not a full house"
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[b90209c3-5956-445b-8a0b-0ac8b906b1c2]
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description = "Four of a kind is not a full house"
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[32a3f4ee-9142-4edf-ba70-6c0f96eb4b0c]
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description = "Yacht is not a full house"
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[b286084d-0568-4460-844a-ba79d71d79c6]
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description = "Four of a Kind"
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[f25c0c90-5397-4732-9779-b1e9b5f612ca]
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description = "Yacht can be scored as Four of a Kind"
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[9f8ef4f0-72bb-401a-a871-cbad39c9cb08]
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description = "Full house is not Four of a Kind"
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[b4743c82-1eb8-4a65-98f7-33ad126905cd]
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description = "Little Straight"
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[7ac08422-41bf-459c-8187-a38a12d080bc]
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description = "Little Straight as Big Straight"
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[97bde8f7-9058-43ea-9de7-0bc3ed6d3002]
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description = "Four in order but not a little straight"
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[cef35ff9-9c5e-4fd2-ae95-6e4af5e95a99]
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description = "No pairs but not a little straight"
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[fd785ad2-c060-4e45-81c6-ea2bbb781b9d]
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description = "Minimum is 1, maximum is 5, but not a little straight"
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[35bd74a6-5cf6-431a-97a3-4f713663f467]
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description = "Big Straight"
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[87c67e1e-3e87-4f3a-a9b1-62927822b250]
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description = "Big Straight as little straight"
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[c1fa0a3a-40ba-4153-a42d-32bc34d2521e]
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description = "No pairs but not a big straight"
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[207e7300-5d10-43e5-afdd-213e3ac8827d]
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description = "Choice"
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[b524c0cf-32d2-4b40-8fb3-be3500f3f135]
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description = "Yacht as choice"

‎exercises/practice/yacht/Package.swift‎

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// swift-tools-version:6.0
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import PackageDescription
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let package = Package(
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name: "Yacht",
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products: [
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.library(
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name: "Yacht",
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targets: ["Yacht"])
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],
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dependencies: [],
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targets: [
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.target(
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name: "Yacht",
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dependencies: []),
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.testTarget(
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name: "YachtTests",
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dependencies: ["Yacht"]),
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]
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)

‎exercises/practice/yacht/Sources/Yacht/Yacht.swift‎

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func score(_ scores: [Int], category: YachtCategory) -> Int {
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// Write your code for the 'Yacht' exercise in this file.
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}

‎exercises/practice/yacht/Sources/Yacht/YachtCategory.swift‎

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enum YachtCategory: String {
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case ones
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case twos
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case threes
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case fours
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case fives
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case sixes
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case fullHouse = "full house"
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case fourOfAKind = "four of a kind"
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case littleStraight = "little straight"
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case bigStraight = "big straight"
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case choice
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case yacht
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}

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