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Extract QueryableExtensions into own NuGet package (#37)
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Tomas Lycken
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Nov 1, 2017
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| using System; | ||
| using System.Linq; | ||
| using Xunit; | ||
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| namespace tlycken.Extensions.Tests | ||
| { | ||
| public class QueryableExtensions | ||
| { | ||
| public class Foo | ||
| { | ||
| public bool Bar { get; set; } | ||
| } | ||
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| [Fact] | ||
| public void CanApplyProjectionToQueryables() | ||
| { | ||
| var foos = new[] { new Foo { Bar = true }, new Foo { Bar = false }, new Foo { Bar = true } }.AsQueryable(); | ||
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| var result = foos.Apply(fs => fs.Where(foo => foo.Bar)); | ||
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| Assert.Equal(2, result.Count()); | ||
| } | ||
| } | ||
| } |
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src/tlycken.Extensions.Tests/tlycken.Extensions.Tests.csproj
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <PropertyGroup> | ||
| <TargetFramework>netcoreapp2.0</TargetFramework> | ||
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| <IsPackable>false</IsPackable> | ||
| </PropertyGroup> | ||
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| <ItemGroup> | ||
| <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.3.0-preview-20170628-02" /> | ||
| <PackageReference Include="xunit" Version="2.2.0" /> | ||
| <PackageReference Include="xunit.runner.visualstudio" Version="2.2.0" /> | ||
| </ItemGroup> | ||
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| <ItemGroup> | ||
| <ProjectReference Include="..\tlycken.Extensions\tlycken.Extensions.csproj" /> | ||
| </ItemGroup> | ||
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| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| // ReSharper disable once CheckNamespace | ||
| namespace System | ||
| { | ||
| public static class FuncExtensions | ||
| { | ||
| /// <summary> | ||
| /// Fluently applies the function <paramref name="projection"/> to the argument <paramref name="source"/>. | ||
| /// </summary> | ||
| /// <remarks>My main use case for this as an abstraction for queryables, taking a | ||
| /// <code>Func{IQueryable{S}, IQueryable{T}}</code> as an argument and applying it | ||
| /// in a longer LINQ method chain.</remarks> | ||
| /// <typeparam name="S">The element type of the queryable sequence</typeparam> | ||
| /// <typeparam name="T">The element type of the result</typeparam> | ||
| /// <param name="source">The source sequence</param> | ||
| /// <param name="projection">A projection to apply to the <paramref name="source"/> sequence</param> | ||
| /// <returns>projection(source)</returns> | ||
| public static T Apply<S, T>(this S source, Func<S, T> projection) => projection(source); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,7 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <PropertyGroup> | ||
| <TargetFramework>netstandard2.0</TargetFramework> | ||
| </PropertyGroup> | ||
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| </Project> |