RangeExtensions 2.1.1

.NET 6.0 .NET Core 3.1 .NET Standard 2.0

dotnet add package RangeExtensions --version 2.1.1

NuGet\Install-Package RangeExtensions -Version 2.1.1

This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.

<PackageReference Include="RangeExtensions" Version="2.1.1" />

For projects that support PackageReference, copy this XML node into the project file to reference the package.

paket add RangeExtensions --version 2.1.1

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: RangeExtensions, 2.1.1"

#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.

// Install RangeExtensions as a Cake Addin
#addin nuget:?package=RangeExtensions&version=2.1.1

// Install RangeExtensions as a Cake Tool
#tool nuget:?package=RangeExtensions&version=2.1.1

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

RangeExtensions

This package enables the usage of System.Range in foreach expressions and provides extensions to integrate it with LINQ as a faster replacement to Enumerable.Range.

Correctness is verified against IEnumerable<int> and Enumerable.Range behavior;
Implementation tries its best to make abstractions either zero-cost or reasonably close to that. For critical paths, performance is tuned to be allocation-free and on par with regular for loops

Features

Range enumeration

foreach (var i in ..100) // you can write 0..Length as just ..Length
{
    Console.WriteLine(i);
}

Reverse range enumeration

for (var i = 100 - 1; i >= 0; i--)
{
    Console.WriteLine(i);
}

// Can be written as
foreach (var i in 100..0)
{
    Console.WriteLine(i);
}

Select and Where

var floats = (0..100).Select(i => (float)i);
var odd = (0..100).Where(i => i % 2 != 0);

var randomNumbers = (0..1000)
    .Select(_ => Random.Shared.Next())
    .ToArray();

Collecting to array or list

var numbers = (0..100).ToArray();

Aggregate

var digits = (0..10)
    .Aggregate(new StringBuilder(), (sb, i) => sb.Append(i))
    .ToString();

Assert.Equal("0123456789", digits);

Other LINQ specializations

var enumerable = (..100).AsEnumerable();

var sum = enumerable.Sum();
var count = enumerable.Count;
var average = enumerable.Average();
var firstTen = enumerable.Take(10);
var reversed = enumerable.Reverse();
// and others

Performance

In .NET 7, foreach (var i in 0..Length) has the same performance as for loop. Otherwise, RangeExtensions is 2 to >10 times faster than Enumerable.Range. Using DynamicPGO significantly improves the performance of both.

BenchmarkDotNet=v0.13.2, OS=macOS 13.1 (22C65) [Darwin 22.2.0]
Apple M1 Pro, 1 CPU, 8 logical and 8 physical cores
.NET SDK=8.0.100-alpha.1.22620.11
  [Host]     : .NET 7.0.1 (7.0.122.56804), Arm64 RyuJIT AdvSIMD
  DefaultJob : .NET 7.0.1 (7.0.122.56804), Arm64 RyuJIT AdvSIMD

Job=ShortRun  IterationCount=3  LaunchCount=1  
WarmupCount=3

DOTNET_TieredPGO=1
DOTNET_ReadyToRun=0

Method	Length	Mean	Error	Ratio	Allocated
For	1	0.0000 ns	0.0000 ns	?	-
Range	1	0.6531 ns	0.0051 ns	?	-
EnumerableRange	1	8.1135 ns	0.0198 ns	?	40 B
RangeSelect	1	1.1588 ns	0.0048 ns	?	-
EnumerableSelect	1	40.7948 ns	0.7697 ns	?	88 B
RangeSelectTwice	1	19.4165 ns	0.0480 ns	?	96 B
EnumerableSelectTwice	1	43.6399 ns	0.0908 ns	?	232 B
RangeWhere	1	1.3954 ns	0.0036 ns	?	-
EnumerableWhere	1	26.1945 ns	0.0534 ns	?	96 B

For	100	36.1897 ns	0.0618 ns	1.00	-
Range	100	36.9244 ns	2.0789 ns	1.00	-
EnumerableRange	100	211.4774 ns	0.6430 ns	5.85	40 B
RangeSelect	100	42.6852 ns	0.1689 ns	1.18	-
EnumerableSelect	100	235.7174 ns	0.5161 ns	6.51	88 B
RangeSelectTwice	100	110.1340 ns	0.1667 ns	3.04	96 B
EnumerableSelectTwice	100	298.2976 ns	2.7831 ns	8.22	232 B
RangeWhere	100	56.1455 ns	0.1701 ns	1.55	-
EnumerableWhere	100	249.1264 ns	1.5890 ns	6.89	96 B

For	100000	31,167.5682 ns	37.3266 ns	1.00	-
Range	100000	31,173.8688 ns	13.0666 ns	1.00	-
EnumerableRange	100000	212,925.2827 ns	156.8182 ns	6.83	40 B
RangeSelect	100000	50,086.3342 ns	39.0657 ns	1.61	-
EnumerableSelect	100000	204,113.5813 ns	100.0221 ns	6.55	88 B
RangeSelectTwice	100000	94,302.1444 ns	230.6254 ns	3.02	96 B
EnumerableSelectTwice	100000	203,946.9247 ns	908.5243 ns	6.56	232 B
RangeWhere	100000	47,165.0569 ns	36.7208 ns	1.51	-
EnumerableWhere	100000	209,918.1519 ns	3,298.4418 ns	6.76	96 B

Product	Compatible and additional computed target framework versions.
.NET	net5.0 was computed. net5.0-windows was computed. net6.0 is compatible. net6.0-android was computed. net6.0-ios was computed. net6.0-maccatalyst was computed. net6.0-macos was computed. net6.0-tvos was computed. net6.0-windows was computed. net7.0 is compatible. net7.0-android was computed. net7.0-ios was computed. net7.0-maccatalyst was computed. net7.0-macos was computed. net7.0-tvos was computed. net7.0-windows was computed. net8.0 was computed. net8.0-android was computed. net8.0-browser was computed. net8.0-ios was computed. net8.0-maccatalyst was computed. net8.0-macos was computed. net8.0-tvos was computed. net8.0-windows was computed.
.NET Core	netcoreapp2.0 was computed. netcoreapp2.1 was computed. netcoreapp2.2 was computed. netcoreapp3.0 was computed. netcoreapp3.1 is compatible.
.NET Standard	netstandard2.0 is compatible. netstandard2.1 is compatible.
.NET Framework	net461 was computed. net462 was computed. net463 was computed. net47 was computed. net471 was computed. net472 was computed. net48 was computed. net481 was computed.
MonoAndroid	monoandroid was computed.
MonoMac	monomac was computed.
MonoTouch	monotouch was computed.
Tizen	tizen40 was computed. tizen60 was computed.
Xamarin.iOS	xamarinios was computed.
Xamarin.Mac	xamarinmac was computed.
Xamarin.TVOS	xamarintvos was computed.
Xamarin.WatchOS	xamarinwatchos was computed.

Compatible target framework(s)

Included target framework(s) (in package)

Learn more about Target Frameworks and .NET Standard.

.NETCoreApp 3.1
- No dependencies.
.NETStandard 2.0
- IndexRange (>= 1.0.2)
.NETStandard 2.1
- No dependencies.
net6.0
- No dependencies.
net7.0
- No dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories (1)

Showing the top 1 popular GitHub repositories that depend on RangeExtensions:

Repository	Stars
U8String/U8String [work-in-progress] Highly functional and performant UTF-8 string primitive for C#	158

Version	Downloads	Last updated
2.1.1	45,562	1/9/2023
2.1.0	313	1/8/2023
2.0.0	322	12/23/2022
1.2.2	721	9/3/2022
1.2.1	401	8/13/2022
1.2.0	389	8/10/2022
1.1.0	395	7/28/2022
1.0.0	413	7/16/2022

https://github.com/neon-sunset/RangeExtensions/releases/tag/2.1.1