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ErikSchierboombobahop
ErikSchierboom
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bobahop
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Add roman-numerals exercise (#266)
* Add roman-numerals exercise * Apply suggestions from code review Co-authored-by: Bob Hoeppner <[email protected]> * Fix --------- Co-authored-by: Bob Hoeppner <[email protected]>
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‎config.json

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],
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"difficulty": 7
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},
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{
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"slug": "roman-numerals",
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"name": "Roman Numerals",
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"uuid": "b15c0460-5174-4f92-bb20-1f0db50a4890",
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"practices": [
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"numbers",
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"while-loops",
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"extension-methods"
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],
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"prerequisites": [
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"strings",
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"while-loops",
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"numbers",
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"extension-methods"
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],
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"difficulty": 5
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},
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{
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"slug": "robot-simulator",
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"name": "Robot Simulator",

‎exercises/Exercises.sln

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@@ -161,6 +161,8 @@ Project("{F184B08F-C81C-45F6-A57F-5ABD9991F28F}") = "DndCharacter", "practice\dn
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EndProject
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Project("{F184B08F-C81C-45F6-A57F-5ABD9991F28F}") = "Poker", "practice\poker\Poker.vbproj", "{F62F286B-2E13-4914-B168-EDB399470B1C}"
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EndProject
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Project("{F184B08F-C81C-45F6-A57F-5ABD9991F28F}") = "RomanNumerals", "practice\roman-numerals\RomanNumerals.vbproj", "{C099D994-E586-4A2F-BDBF-A1D6742B1794}"
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EndProject
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Project("{F184B08F-C81C-45F6-A57F-5ABD9991F28F}") = "RobotSimulator", "practice\robot-simulator\RobotSimulator.vbproj", "{86A4A18F-6FC1-4953-9AAE-EEEE36FE8E2E}"
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EndProject
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Project("{F184B08F-C81C-45F6-A57F-5ABD9991F28F}") = "Triangle", "practice\triangle\Triangle.vbproj", "{1CE933B5-94BD-48AD-81B9-E352D75020CB}"
@@ -494,6 +496,10 @@ Global
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{F62F286B-2E13-4914-B168-EDB399470B1C}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{F62F286B-2E13-4914-B168-EDB399470B1C}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{F62F286B-2E13-4914-B168-EDB399470B1C}.Release|Any CPU.Build.0 = Release|Any CPU
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{C099D994-E586-4A2F-BDBF-A1D6742B1794}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{C099D994-E586-4A2F-BDBF-A1D6742B1794}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{C099D994-E586-4A2F-BDBF-A1D6742B1794}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{C099D994-E586-4A2F-BDBF-A1D6742B1794}.Release|Any CPU.Build.0 = Release|Any CPU
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{86A4A18F-6FC1-4953-9AAE-EEEE36FE8E2E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{86A4A18F-6FC1-4953-9AAE-EEEE36FE8E2E}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{86A4A18F-6FC1-4953-9AAE-EEEE36FE8E2E}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -598,6 +604,7 @@ Global
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{057DDB74-6435-4B9E-988A-A21895AECE92} = {B161412A-37BB-42B7-9D8F-F4B238E3CFFA}
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{1C5BEE1E-B2B8-4D08-BC42-D83121DFFFB9} = {B161412A-37BB-42B7-9D8F-F4B238E3CFFA}
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{F62F286B-2E13-4914-B168-EDB399470B1C} = {B161412A-37BB-42B7-9D8F-F4B238E3CFFA}
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{C099D994-E586-4A2F-BDBF-A1D6742B1794} = {B161412A-37BB-42B7-9D8F-F4B238E3CFFA}
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{86A4A18F-6FC1-4953-9AAE-EEEE36FE8E2E} = {B161412A-37BB-42B7-9D8F-F4B238E3CFFA}
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{1CE933B5-94BD-48AD-81B9-E352D75020CB} = {B161412A-37BB-42B7-9D8F-F4B238E3CFFA}
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{B6F54248-A909-42A1-9A75-679160C63B28} = {B161412A-37BB-42B7-9D8F-F4B238E3CFFA}

‎exercises/practice/roman-numerals/.docs/instructions.append.md

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# Hints
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This exercise requires you to write an extension method. For more information, see [this page](https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/extension-methods).

‎exercises/practice/roman-numerals/.docs/instructions.md

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# Instructions
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Write a function to convert from normal numbers to Roman Numerals.
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The Romans were a clever bunch.
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They conquered most of Europe and ruled it for hundreds of years.
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They invented concrete and straight roads and even bikinis.
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One thing they never discovered though was the number zero.
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This made writing and dating extensive histories of their exploits slightly more challenging, but the system of numbers they came up with is still in use today.
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For example the BBC uses Roman numerals to date their programs.
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The Romans wrote numbers using letters - I, V, X, L, C, D, M.
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(notice these letters have lots of straight lines and are hence easy to hack into stone tablets).
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```text
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1 => I
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10 => X
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7 => VII
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```
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The maximum number supported by this notation is 3,999.
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(The Romans themselves didn't tend to go any higher)
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Wikipedia says: Modern Roman numerals ... are written by expressing each digit separately starting with the left most digit and skipping any digit with a value of zero.
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To see this in practice, consider the example of 1990.
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In Roman numerals 1990 is MCMXC:
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1000=M
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900=CM
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90=XC
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2008 is written as MMVIII:
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2000=MM
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8=VIII
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Learn more about [Roman numerals on Wikipedia][roman-numerals].
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[roman-numerals]: https://wiki.imperivm-romanvm.com/wiki/Roman_Numerals

‎exercises/practice/roman-numerals/.meta/Example.vb

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Imports System.Collections.Generic
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Imports System.Text
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Imports System.Runtime.CompilerServices
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Module RomanNumeralExtension
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Private ReadOnly ArabicToRomanConversions As New Dictionary(Of Integer, String) From {
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{1000, "M"},
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{900, "CM"},
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{500, "D"},
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{400, "CD"},
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{100, "C"},
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{90, "XC"},
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{50, "L"},
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{40, "XL"},
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{10, "X"},
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{9, "IX"},
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{5, "V"},
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{4, "IV"},
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{1, "I"}
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}
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<Extension()>
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Function ToRoman(ByVal value As Integer) As String
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Dim result = New StringBuilder()
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Dim remainder = value
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For Each conversion In ArabicToRomanConversions
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While remainder >= conversion.Key
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remainder -= conversion.Key
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result.Append(conversion.Value)
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End While
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Next
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Return result.ToString()
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End Function
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End Module

‎exercises/practice/roman-numerals/.meta/config.json

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{
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"authors": [
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"ErikSchierboom",
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"bobahop"
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],
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"files": {
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"solution": [
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"RomanNumerals.vb"
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],
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"test": [
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"RomanNumeralsTests.vb"
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],
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"example": [
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".meta/Example.vb"
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]
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},
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"blurb": "Write a function to convert from normal numbers to Roman Numerals.",
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"source": "The Roman Numeral Kata",
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"source_url": "https://codingdojo.org/kata/RomanNumerals/"
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}

‎exercises/practice/roman-numerals/.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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[19828a3a-fbf7-4661-8ddd-cbaeee0e2178]
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description = "1 is I"
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[f088f064-2d35-4476-9a41-f576da3f7b03]
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description = "2 is II"
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[b374a79c-3bea-43e6-8db8-1286f79c7106]
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description = "3 is III"
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[05a0a1d4-a140-4db1-82e8-fcc21fdb49bb]
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description = "4 is IV"
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[57c0f9ad-5024-46ab-975d-de18c430b290]
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description = "5 is V"
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[20a2b47f-e57f-4797-a541-0b3825d7f249]
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description = "6 is VI"
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[ff3fb08c-4917-4aab-9f4e-d663491d083d]
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description = "9 is IX"
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[2bda64ca-7d28-4c56-b08d-16ce65716cf6]
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description = "27 is XXVII"
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[a1f812ef-84da-4e02-b4f0-89c907d0962c]
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description = "48 is XLVIII"
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[607ead62-23d6-4c11-a396-ef821e2e5f75]
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description = "49 is XLIX"
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[d5b283d4-455d-4e68-aacf-add6c4b51915]
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description = "59 is LIX"
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[46b46e5b-24da-4180-bfe2-2ef30b39d0d0]
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description = "93 is XCIII"
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[30494be1-9afb-4f84-9d71-db9df18b55e3]
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description = "141 is CXLI"
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[267f0207-3c55-459a-b81d-67cec7a46ed9]
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description = "163 is CLXIII"
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[cdb06885-4485-4d71-8bfb-c9d0f496b404]
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description = "402 is CDII"
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[6b71841d-13b2-46b4-ba97-dec28133ea80]
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description = "575 is DLXXV"
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[432de891-7fd6-4748-a7f6-156082eeca2f]
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description = "911 is CMXI"
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[e6de6d24-f668-41c0-88d7-889c0254d173]
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description = "1024 is MXXIV"
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[bb550038-d4eb-4be2-a9ce-f21961ac3bc6]
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description = "3000 is MMM"
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[6d1d82d5-bf3e-48af-9139-87d7165ed509]
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description = "16 is XVI"
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[4465ffd5-34dc-44f3-ada5-56f5007b6dad]
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description = "66 is LXVI"
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[902ad132-0b4d-40e3-8597-ba5ed611dd8d]
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description = "166 is CLXVI"
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[dacb84b9-ea1c-4a61-acbb-ce6b36674906]
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description = "666 is DCLXVI"
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[efbe1d6a-9f98-4eb5-82bc-72753e3ac328]
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description = "1666 is MDCLXVI"
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[3bc4b41c-c2e6-49d9-9142-420691504336]
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description = "3001 is MMMI"
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[4e18e96b-5fbb-43df-a91b-9cb511fe0856]
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description = "3999 is MMMCMXCIX"

‎exercises/practice/roman-numerals/RomanNumerals.vb

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Imports System.Runtime.CompilerServices
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Module RomanNumeralExtension
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<Extension()>
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Function ToRoman(ByVal value As Integer) As String
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Throw New NotImplementedException("You need to implement this function.")
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End Function
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End Module

‎exercises/practice/roman-numerals/RomanNumerals.vbproj

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>net7.0</TargetFramework>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.4.1" />
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<PackageReference Include="xunit" Version="2.4.2" />
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<PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
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<PrivateAssets>all</PrivateAssets>
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<IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
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</PackageReference>
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</ItemGroup>
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</Project>

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