AsyncEnumerator 1.1.0

.NET Framework
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Install-Package AsyncEnumerator -Version 1.1.0
dotnet add package AsyncEnumerator --version 1.1.0
<PackageReference Include="AsyncEnumerator" Version="1.1.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add AsyncEnumerator --version 1.1.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: AsyncEnumerator, 1.1.0"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install AsyncEnumerator as a Cake Addin
#addin nuget:?package=AsyncEnumerator&version=1.1.0

// Install AsyncEnumerator as a Cake Tool
#tool nuget:?package=AsyncEnumerator&version=1.1.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Introduces IAsyncEnumerable, IAsyncEnumerator, ForEachAsync(), and ParallelForEachAsync()
GitHub: https://github.com/tyrotoxin/AsyncEnumerable

PROBLEM SPACE

Helps to (a) create an element provider, where producing an element can take a lot of time
due to dependency on other asynchronous events (e.g. wait handles, network streams), and
(b) a consumer that processes those element as soon as they are ready without blocking
the thread (the processing is scheduled on a worker thread instead).


EXAMPLE

using System.Collections.Async;

static IAsyncEnumerable<int> ProduceAsyncNumbers(int start, int end)
{
 return new AsyncEnumerable<int>(async yield => {

   // Just to show that ReturnAsync can be used multiple times
   await yield.ReturnAsync(start);

   for (int number = start + 1; number <= end; number++)
     await yield.ReturnAsync(number);

   // You can break the enumeration loop with the following call:
   yield.Break();

   // This won't be executed due to the loop break above
   await yield.ReturnAsync(12345);
 });
}

// Just to compare with synchronous version of enumerator
static IEnumerable<int> ProduceNumbers(int start, int end)
{
 yield return start;

 for (int number = start + 1; number <= end; number++)
   yield return number;

 yield break;

 yield return 12345;
}

static async Task ConsumeNumbersAsync()
{
 var asyncEnumerableCollection = ProduceAsyncNumbers(start: 1, end: 10);
 await asyncEnumerableCollection.ForEachAsync(async number => {
   await Console.Out.WriteLineAsync($"{number}");
 });
}

// Just to compare with synchronous version of enumeration
static void ConsumeNumbers()
{
 // NOTE: IAsyncEnumerable is derived from IEnumerable, so you can use either
 var enumerableCollection = ProduceAsyncNumbers(start: 1, end: 10);
 //var enumerableCollection = ProduceNumbers(start: 1, end: 10);

 foreach (var number in enumerableCollection) {
   Console.Out.WriteLine($"{number}");
 }
}

Product Versions
.NET Framework net
Compatible target framework(s)
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Learn more about Target Frameworks and .NET Standard.

This package has no dependencies.

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GitHub repositories (8)

Showing the top 5 popular GitHub repositories that depend on AsyncEnumerator:

Repository Stars
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Version Downloads Last updated
4.0.2 4,164,739 12/4/2019
4.0.1 94,505 10/22/2019
4.0.0 11,152 10/18/2019
3.1.0 78,685 9/23/2019
2.2.2 1,538,218 1/27/2019
2.2.1 1,291,191 5/29/2018
2.2.0 28,805 5/18/2018
2.1.1 158,700 1/20/2018
2.1.0 280,328 5/22/2017
2.0.1 51,359 2/13/2017
1.5.0 3,955 2/12/2017
1.4.2 1,590 2/6/2017
1.3.0 1,857 1/20/2017
1.2.3 6,854 1/6/2017
1.2.2 2,186 12/11/2016
1.2.1 842 12/10/2016
1.2.0 19,241 11/29/2016
1.1.3 909 11/28/2016
1.1.2 45,428 8/29/2016
1.0.3 3,705 4/28/2016

Add ParallelForEachAsync extension methods for IEnumerable<T> and IAsyncEnumerable<T> in System.Collections.Async namespace.