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Create reverser that reverses an array at a given position.

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This commit is contained in:
Kristian Stolen
2022-01-12 17:56:26 +08:00
parent 2eab61fd1d
commit 84d473d8f2
6 changed files with 134 additions and 0 deletions
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26
73_Reverse/csharp/Reverse/Reverse.Tests/Reverse.Tests.csproj Normal file
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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net5.0</TargetFramework>
<IsPackable>false</IsPackable>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
<PackageReference Include="xunit" Version="2.4.1" />
<PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
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<ProjectReference Include="..\Reverse\Reverse.csproj" />
</ItemGroup>
</Project>

41
73_Reverse/csharp/Reverse/Reverse.Tests/ReverserTests.cs Normal file
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using System.Linq;
using Xunit;
namespace Reverse.Tests
{
public class ReverserTests
{
[Theory]
[InlineData(new int[] { 1 }, new int[] { 1 })]
[InlineData(new int[] { 1, 2 }, new int[] { 2, 1 })]
[InlineData(new int[] { 1, 2, 3 }, new int[] { 3, 2, 1 })]
public void ReverserReversesTheArray(int[] input, int[] output)
{
Reverser.Reverse(input, input.Length);
Assert.True(input.SequenceEqual(output));
}
[Fact]
public void ReverserReversesTheArrayAtTheSpecifiedIndex()
{
var input = new int[] { 1, 2, 3, 4 };
var output = new int[] { 2, 1, 3, 4 };
Reverser.Reverse(input, 2);
Assert.True(input.SequenceEqual(output));
}
[Fact]
public void ReversingAtIndexOneDoesNotChangeTheArray()
{
var input = new int[] { 1, 2 };
var output = new int[] { 1, 2 };
Reverser.Reverse(input, 1);
Assert.True(input.SequenceEqual(output));
}
}
}

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73_Reverse/csharp/Reverse/Reverse.sln Normal file
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{96E824F8-0353-4FF2-9FEA-F850E2BE7312}.Release|Any CPU.Build.0 = Release|Any CPU
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12
73_Reverse/csharp/Reverse/Reverse/Program.cs Normal file
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using System;
namespace Reverse
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
}
}
}

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73_Reverse/csharp/Reverse/Reverse/Reverse.csproj Normal file
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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net5.0</TargetFramework>
</PropertyGroup>
</Project>

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73_Reverse/csharp/Reverse/Reverse/Reverser.cs Normal file
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namespace Reverse
{
public class Reverser
{
public static void Reverse(int[] arrayToReverse, int indexToReverseTo)
{
for (int i = 0; i < indexToReverseTo / 2; i++)
{
int temp = arrayToReverse[i];
int upperIndex = indexToReverseTo - 1 - i;
arrayToReverse[i] = arrayToReverse[upperIndex];
arrayToReverse[upperIndex] = temp;
}
}
}
}