Commons.Collections.SquareList 1.1.1

.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.1 This package targets .NET Standard 2.1. The package is compatible with this framework or higher. 
dotnet add package Commons.Collections.SquareList --version 1.1.1                

                    
                

            
NuGet\Install-Package Commons.Collections.SquareList -Version 1.1.1
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="Commons.Collections.SquareList" Version="1.1.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add Commons.Collections.SquareList --version 1.1.1                

                    
                

            
#r "nuget: Commons.Collections.SquareList, 1.1.1"
#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 Commons.Collections.SquareList as a Cake Addin
#addin nuget:?package=Commons.Collections.SquareList&version=1.1.1

// Install Commons.Collections.SquareList as a Cake Tool
#tool nuget:?package=Commons.Collections.SquareList&version=1.1.1

Commons.Collections.SquareList

Managed Commons library containing the SquareList specialized collection.

Now requires .NET 8.0/C# 12 to build

Loosely based on an article published in the May 2013 issue of Dr Dobb's Journal, by Mark Sams. His implementation in C used circular doubly-linked lists of doubly-linked lists, I've reimplemented using a List of Dynamic Slices backed by a single Big Array, It uses a lot less memory than linked lists, but inserts in crammed sets can have ripple effects with worst case O(n).

This implementation allows for multiple instances of the same value to be inserted, and then deleted one-at-a-time or wholesale.

Thinking about performance, search for counting/existence is done bidirectionally, but removal scans only in the forward direction, to have a stable behavior (remove the first found) when duplicates exist.

The SquareList is a structure that is particularly useful in applications that frequently require the current minimum and maximum values, as they both can be found in constant time, even accounting for deletions. This implementation performs insert/delete/find operations within a worst-case running time of O(sqrt(n)) [In truth O(n) for inserts]. Values are always kept in ascending order, so traversing it in that order is natural and performant.

Commons.Collections.SquareList 1.1.1 is available at Nuget: Commons.Collections.SquareList.

Targets in the package

Release .NET Standard 1.0 .NET Standard 2.1 .NET 6.0 .NET 8.0 .NET 9.0
1.0.0 ✔
1.0.2 ✔
1.0.3 ✔ ✔
1.0.4 ✔ ✔ ✔
1.0.5 ✔ ✔ ✔
1.0.6 ✔ ✔ ✔
1.0.7 ✔ ✔ ✔ ✔
1.0.8 ✔ ✔ ✔ ✔
1.1.0 ✘ ✔ ✘ ✔ ✔

Performance

Some performance testing, all times in ms (updated and now using release version of nuget, on .NET 6.0):

SortedList (all times in ms) [.NET 8.0]

Initial Size Creation Deletes Inserts Searchs Min Max
1000 0 1 0 0 26 34
1779 0 0 0 0 24 28
3163 0 0 0 0 32 37
5624 0 1 1 0 24 32
10000 1 2 16 0 23 29
17783 1 1 2 0 26 29
31623 2 3 4 0 20 30
56235 4 5 5 0 26 44
100000 20 27 26 0 28 34
177828 11 19 25 0 36 29
316228 20 37 38 0 23 30
562342 37 139 58 0 20 26
1000000 60 266 121 0 20 25
1778280 109 540 296 0 20 25
3162278 198 1001 728 0 20 25
5623414 402 1804 1480 0 19 25
10000000 653 3237 2806 0 20 27
17782795 1195 5789 5294 0 21 27
31622777 2235 10510 9456 1 20 27

SquareList (all times in ms) [.NET 8.0]

Initial Size Creation Deletes Inserts Reinserts Searchs Min Max CutInHalf Shrink
1000 3 2 1 1 1 0 0 0 0
1779 0 1 2 0 1 0 0 0 0
3163 2 1 1 1 2 0 0 0 0
5624 0 1 1 1 1 0 0 0 0
10000 1 3 2 3 1 0 0 0 0
17783 1 4 3 3 1 0 0 0 0
31623 2 4 3 4 1 0 0 0 1
56235 3 6 4 10 1 0 0 0 1
100000 5 6 4 12 1 0 0 0 9
177828 9 7 5 23 1 0 0 1 3
316228 17 9 7 39 1 0 0 1 6
562342 25 10 8 60 1 0 0 2 9
1000000 54 12 4 107 1 0 0 1 16
1778280 78 17 16 183 1 0 0 5 30
3162278 143 22 17 332 2 0 0 13 59
5623414 249 28 22 594 2 0 0 12 87
10000000 442 36 31 1052 2 0 0 35 157
17782795 790 50 41 1890 2 0 0 45 287
31622777 1412 66 55 3358 2 0 0 80 501

License: MIT

See LICENSE

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  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 was computed.  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 is compatible.  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.  net9.0 is compatible. 
.NET Core netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.1 is compatible. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen 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.

  • .NETStandard 2.1

    • No dependencies.

  • net8.0

    • No dependencies.

  • net9.0

    • No dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
1.1.1 74 11/14/2024
1.0.8 71 7/31/2024
1.0.6 430 8/10/2022
1.0.5 439 1/21/2022
1.0.4 280 11/15/2021
1.0.3 303 11/15/2021
1.0.2 372 11/10/2020
1.0.0 541 5/31/2019

Packaging for netstandard2.1;net8.0;net9.0