Add resistor-color exercise (#1287)

config.json

@@ -2117,6 +2117,14 @@
           "lists"
         ],
         "difficulty": 5
+      },
+      {
+        "slug": "resistor-color",
+        "name": "Resistor Color",
+        "uuid": "bd2bd26c-6eab-411d-8472-7643cb86c6c9",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 1
       }
     ],
     "foregone": [

exercises/Exercises.sln

@@ -279,6 +279,8 @@ Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "ZebraPuzzle", "practice\zeb
 EndProject
 Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "Zipper", "practice\zipper\Zipper.fsproj", "{73AB6DA8-AA91-44A9-B5E5-0670FFB6A4AC}"
 EndProject
+Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "ResistorColor", "practice\resistor-color\ResistorColor.fsproj", "{6D2CFE86-D6B2-4820-B3D8-62255BF94DCD}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -832,6 +834,10 @@ Global
 		{73AB6DA8-AA91-44A9-B5E5-0670FFB6A4AC}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{73AB6DA8-AA91-44A9-B5E5-0670FFB6A4AC}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{73AB6DA8-AA91-44A9-B5E5-0670FFB6A4AC}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6D2CFE86-D6B2-4820-B3D8-62255BF94DCD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6D2CFE86-D6B2-4820-B3D8-62255BF94DCD}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6D2CFE86-D6B2-4820-B3D8-62255BF94DCD}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6D2CFE86-D6B2-4820-B3D8-62255BF94DCD}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{9815492D-D8F9-439C-B73C-711693755626} = {9D239135-8242-4AC0-94AE-7CCD8408B531}
@@ -970,5 +976,6 @@ Global
 		{FA29F301-0448-47A3-941C-ABB8A8ED367A} = {29984DF2-2734-483C-BC7D-F6D41599DACD}
 		{F6217F6F-DD9C-4DBD-8A7A-894E05FCF78E} = {29984DF2-2734-483C-BC7D-F6D41599DACD}
 		{73AB6DA8-AA91-44A9-B5E5-0670FFB6A4AC} = {29984DF2-2734-483C-BC7D-F6D41599DACD}
+		{6D2CFE86-D6B2-4820-B3D8-62255BF94DCD} = {29984DF2-2734-483C-BC7D-F6D41599DACD}
 	EndGlobalSection
 EndGlobal

exercises/practice/resistor-color/.config/dotnet-tools.json

@@ -0,0 +1,12 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "fantomas-tool": {
+      "version": "4.7.9",
+      "commands": [
+        "fantomas"
+      ]
+    }
+  }
+}

exercises/practice/resistor-color/.docs/instructions.md

@@ -0,0 +1,39 @@
+# Instructions
+
+If you want to build something using a Raspberry Pi, you'll probably use _resistors_.
+For this exercise, you need to know two things about them:
+
+- Each resistor has a resistance value.
+- Resistors are small - so small in fact that if you printed the resistance value on them, it would be hard to read.
+
+To get around this problem, manufacturers print color-coded bands onto the resistors to denote their resistance values.
+Each band has a position and a numeric value.
+
+The first 2 bands of a resistor have a simple encoding scheme: each color maps to a single number.
+
+In this exercise you are going to create a helpful program so that you don't have to remember the values of the bands.
+
+These colors are encoded as follows:
+
+- black: 0
+- brown: 1
+- red: 2
+- orange: 3
+- yellow: 4
+- green: 5
+- blue: 6
+- violet: 7
+- grey: 8
+- white: 9
+
+The goal of this exercise is to create a way:
+
+- to look up the numerical value associated with a particular color band
+- to list the different band colors
+
+Mnemonics map the colors to the numbers, that, when stored as an array, happen to map to their index in the array:
+Better Be Right Or Your Great Big Values Go Wrong.
+
+More information on the color encoding of resistors can be found in the [Electronic color code Wikipedia article][e-color-code].
+
+[e-color-code]: https://en.wikipedia.org/wiki/Electronic_color_code

exercises/practice/resistor-color/.meta/Example.fs

@@ -0,0 +1,15 @@
+module ResistorColor
+
+let colors =
+    [ "black"
+      "brown"
+      "red"
+      "orange"
+      "yellow"
+      "green"
+      "blue"
+      "violet"
+      "grey"
+      "white" ]
+
+let colorCode color = List.findIndex ((=) color) colors

exercises/practice/resistor-color/.meta/config.json

@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "erikschierboom"
+  ],
+  "files": {
+    "solution": [
+      "ResistorColor.fs"
+    ],
+    "test": [
+      "ResistorColorTests.fs"
+    ],
+    "example": [
+      ".meta/Example.fs"
+    ]
+  },
+  "blurb": "Convert a resistor band's color to its numeric representation.",
+  "source": "Maud de Vries, Erik Schierboom",
+  "source_url": "https://github.com/exercism/problem-specifications/issues/1458"
+}

exercises/practice/resistor-color/.meta/tests.toml

@@ -0,0 +1,22 @@
+# 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.
+
+[49eb31c5-10a8-4180-9f7f-fea632ab87ef]
+description = "Color codes -> Black"
+
+[0a4df94b-92da-4579-a907-65040ce0b3fc]
+description = "Color codes -> White"
+
+[5f81608d-f36f-4190-8084-f45116b6f380]
+description = "Color codes -> Orange"
+
+[581d68fa-f968-4be2-9f9d-880f2fb73cf7]
+description = "Colors"

exercises/practice/resistor-color/ResistorColor.fs

@@ -0,0 +1,6 @@
+module ResistorColor
+
+let colors: string list = failwith "You need to define the 'colors' binding."
+
+let colorCode (color: string) string =
+    failwith "Please implement the 'colorCode' function"

exercises/practice/resistor-color/ResistorColor.fsproj

@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <IsPackable>false</IsPackable>
+    <GenerateProgramFile>false</GenerateProgramFile>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="ResistorColor.fs" />
+    <Compile Include="ResistorColorTests.fs" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Exercism.Tests" Version="0.1.0-beta1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.3" />
+    <PackageReference Include="xunit" Version="2.4.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="FsUnit.xUnit" Version="4.0.4" />
+  </ItemGroup>
+</Project>

exercises/practice/resistor-color/ResistorColorTests.fs

@@ -0,0 +1,31 @@
+module ResistorColorTests
+
+open FsUnit.Xunit
+open Xunit
+
+open ResistorColor
+
+[<Fact>]
+let ``Black`` () = colorCode "black" |> should equal 0
+
+[<Fact(Skip = "Remove this Skip property to run this test")>]
+let ``White`` () = colorCode "white" |> should equal 9
+
+[<Fact(Skip = "Remove this Skip property to run this test")>]
+let ``Orange`` () = colorCode "orange" |> should equal 3
+
+[<Fact(Skip = "Remove this Skip property to run this test")>]
+let ``Colors`` () =
+    colors
+    |> should
+        equal
+        [ "black"
+          "brown"
+          "red"
+          "orange"
+          "yellow"
+          "green"
+          "blue"
+          "violet"
+          "grey"
+          "white" ]

generators/Generators.fs

@@ -2029,3 +2029,6 @@ type GameOfLife() =
         match Seq.isEmpty value with
         | true -> Some "int[,]"
         | false -> None
+
+type ResistorColor() =
+    inherit ExerciseGenerator()