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[New Exercise]: Darts #707

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8 changes: 8 additions & 0 deletions config.json
Original file line number Diff line number Diff line change
@@ -408,6 +408,14 @@
"transforming"
]
},
{
"slug": "darts",
"name": "Darts",
"uuid": "bdbc6f27-bc98-4edf-9f1d-93dbe49da361",
"practices": [],
"prerequisites": [],
"difficulty": 2
},
{
"slug": "bob",
"name": "Bob",
31 changes: 31 additions & 0 deletions exercises/practice/darts/.docs/instructions.md
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@@ -0,0 +1,31 @@
# Instructions

Calculate the points scored in a single toss of a Darts game.

[Darts][darts] is a game where players throw darts at a [target][darts-target].

In our particular instance of the game, the target rewards 4 different amounts of points, depending on where the dart lands:

![Our dart scoreboard with values from a complete miss to a bullseye](https://assets.exercism.org/images/exercises/darts/darts-scoreboard.svg)

- If the dart lands outside the target, player earns no points (0 points).
- If the dart lands in the outer circle of the target, player earns 1 point.
- If the dart lands in the middle circle of the target, player earns 5 points.
- If the dart lands in the inner circle of the target, player earns 10 points.

The outer circle has a radius of 10 units (this is equivalent to the total radius for the entire target), the middle circle a radius of 5 units, and the inner circle a radius of 1.
Of course, they are all centered at the same point — that is, the circles are [concentric][] defined by the coordinates (0, 0).

Given a point in the target (defined by its [Cartesian coordinates][cartesian-coordinates] `x` and `y`, where `x` and `y` are [real][real-numbers]), calculate the correct score earned by a dart landing at that point.

## Credit

The scoreboard image was created by [habere-et-dispertire][habere-et-dispertire] using [Inkscape][inkscape].

[darts]: https://en.wikipedia.org/wiki/Darts
[darts-target]: https://en.wikipedia.org/wiki/Darts#/media/File:Darts_in_a_dartboard.jpg
[concentric]: https://mathworld.wolfram.com/ConcentricCircles.html
[cartesian-coordinates]: https://www.mathsisfun.com/data/cartesian-coordinates.html
[real-numbers]: https://www.mathsisfun.com/numbers/real-numbers.html
[habere-et-dispertire]: https://exercism.org/profiles/habere-et-dispertire
[inkscape]: https://en.wikipedia.org/wiki/Inkscape
15 changes: 15 additions & 0 deletions exercises/practice/darts/.meta/Sources/Darts/DartsExample.swift
Original file line number Diff line number Diff line change
@@ -0,0 +1,15 @@
import Foundation

func dartScore(x: Double, y: Double) -> Int {
let distance = sqrt(x * x + y * y)
switch distance {
case 0...1:
return 10
case 1...5:
return 5
case 5...10:
return 1
default:
return 0
}
}
18 changes: 18 additions & 0 deletions exercises/practice/darts/.meta/config.json
Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
{
"authors": [
"meatball133"
],
"files": {
"solution": [
"Sources/Darts/Darts.swift"
],
"test": [
"Tests/DartsTests/DartsTests.swift"
],
"example": [
".meta/Sources/Darts/DartsExample.swift"
]
},
"blurb": "Calculate the points scored in a single toss of a Darts game.",
"source": "Inspired by an exercise created by a professor Della Paolera in Argentina"
}
16 changes: 16 additions & 0 deletions exercises/practice/darts/.meta/template.swift
Original file line number Diff line number Diff line change
@@ -0,0 +1,16 @@
import XCTest
@testable import {{exercise|camelCase}}
class {{exercise|camelCase}}Tests: XCTestCase {
let runAll = Bool(ProcessInfo.processInfo.environment["RUNALL", default: "false"]) ?? false

{% for case in cases %}
{% if forloop.first -%}
func test{{case.description |camelCase }}() {
{% else -%}
func test{{case.description |camelCase }}() throws {
try XCTSkipIf(true && !runAll) // change true to false to run this test
{% endif -%}
XCTAssertEqual(dartScore(x: {{case.input.x | round:1 }}, y: {{case.input.y | round:1}}), {{case.expected}})
}
{% endfor -%}
}
49 changes: 49 additions & 0 deletions exercises/practice/darts/.meta/tests.toml
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@@ -0,0 +1,49 @@
# 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.

[9033f731-0a3a-4d9c-b1c0-34a1c8362afb]
description = "Missed target"

[4c9f6ff4-c489-45fd-be8a-1fcb08b4d0ba]
description = "On the outer circle"

[14378687-ee58-4c9b-a323-b089d5274be8]
description = "On the middle circle"

[849e2e63-85bd-4fed-bc3b-781ae962e2c9]
description = "On the inner circle"

[1c5ffd9f-ea66-462f-9f06-a1303de5a226]
description = "Exactly on center"

[b65abce3-a679-4550-8115-4b74bda06088]
description = "Near the center"

[66c29c1d-44f5-40cf-9927-e09a1305b399]
description = "Just within the inner circle"

[d1012f63-c97c-4394-b944-7beb3d0b141a]
description = "Just outside the inner circle"

[ab2b5666-b0b4-49c3-9b27-205e790ed945]
description = "Just within the middle circle"

[70f1424e-d690-4860-8caf-9740a52c0161]
description = "Just outside the middle circle"

[a7dbf8db-419c-4712-8a7f-67602b69b293]
description = "Just within the outer circle"

[e0f39315-9f9a-4546-96e4-a9475b885aa7]
description = "Just outside the outer circle"

[045d7d18-d863-4229-818e-b50828c75d19]
description = "Asymmetric position between the inner and middle circles"
21 changes: 21 additions & 0 deletions exercises/practice/darts/Package.swift
Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
// swift-tools-version:5.3

import PackageDescription

let package = Package(
name: "Darts",
products: [
.library(
name: "Darts",
targets: ["Darts"])
],
dependencies: [],
targets: [
.target(
name: "Darts",
dependencies: []),
.testTarget(
name: "DartsTests",
dependencies: ["Darts"]),
]
)
3 changes: 3 additions & 0 deletions exercises/practice/darts/Sources/Darts/Darts.swift
Original file line number Diff line number Diff line change
@@ -0,0 +1,3 @@
func dartScore(x: Double, y: Double) -> Int {
// Write your code for the 'Darts' exercise here.
}
71 changes: 71 additions & 0 deletions exercises/practice/darts/Tests/DartsTests/DartsTests.swift
Original file line number Diff line number Diff line change
@@ -0,0 +1,71 @@
import XCTest

@testable import Darts

class DartsTests: XCTestCase {
let runAll = Bool(ProcessInfo.processInfo.environment["RUNALL", default: "false"]) ?? false

func testMissedTarget() {
XCTAssertEqual(dartScore(x: -9, y: 9), 0)
}

func testOnTheOuterCircle() throws {
try XCTSkipIf(true && !runAll) // change true to false to run this test
XCTAssertEqual(dartScore(x: 0, y: 10), 1)
}

func testOnTheMiddleCircle() throws {
try XCTSkipIf(true && !runAll) // change true to false to run this test
XCTAssertEqual(dartScore(x: -5, y: 0), 5)
}

func testOnTheInnerCircle() throws {
try XCTSkipIf(true && !runAll) // change true to false to run this test
XCTAssertEqual(dartScore(x: 0, y: -1), 10)
}

func testExactlyOnCenter() throws {
try XCTSkipIf(true && !runAll) // change true to false to run this test
XCTAssertEqual(dartScore(x: 0, y: 0), 10)
}

func testNearTheCenter() throws {
try XCTSkipIf(true && !runAll) // change true to false to run this test
XCTAssertEqual(dartScore(x: -0.1, y: -0.1), 10)
}

func testJustWithinTheInnerCircle() throws {
try XCTSkipIf(true && !runAll) // change true to false to run this test
XCTAssertEqual(dartScore(x: 0.7, y: 0.7), 10)
}

func testJustOutsideTheInnerCircle() throws {
try XCTSkipIf(true && !runAll) // change true to false to run this test
XCTAssertEqual(dartScore(x: 0.8, y: -0.8), 5)
}

func testJustWithinTheMiddleCircle() throws {
try XCTSkipIf(true && !runAll) // change true to false to run this test
XCTAssertEqual(dartScore(x: -3.5, y: 3.5), 5)
}

func testJustOutsideTheMiddleCircle() throws {
try XCTSkipIf(true && !runAll) // change true to false to run this test
XCTAssertEqual(dartScore(x: -3.6, y: -3.6), 1)
}

func testJustWithinTheOuterCircle() throws {
try XCTSkipIf(true && !runAll) // change true to false to run this test
XCTAssertEqual(dartScore(x: -7, y: 7), 1)
}

func testJustOutsideTheOuterCircle() throws {
try XCTSkipIf(true && !runAll) // change true to false to run this test
XCTAssertEqual(dartScore(x: 7.1, y: -7.1), 0)
}

func testAsymmetricPositionBetweenTheInnerAndMiddleCircles() throws {
try XCTSkipIf(true && !runAll) // change true to false to run this test
XCTAssertEqual(dartScore(x: 0.5, y: -4), 5)
}
}
3 changes: 3 additions & 0 deletions generator/Sources/Generator/generator-plugins.swift
Original file line number Diff line number Diff line change
@@ -223,6 +223,9 @@ class GeneratorPlugins {
}

ext.registerFilter("round") { (value: Any?, args: [Any?]) in
if let inputNumber = value as? Int {
return inputNumber
}
if let inputNumber = value as? Double {
if let precision = args.first as? Int {
let divisor = pow(10.0, Double(precision))