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Changelog

This project adheres to Semantic Versioning.

[6.3.0] -

Added

  • More nullable reference type support.
  • Natural string comparers that compare numeric substrings as numeric values.
    • Note: GetHashCode for natural string comparers will allocate memory on all platforms older than .NET Core 3.0, including all versions of .NET Framework.
    • Note: GetHashCode will cause extra collisions when used with invariant cultures on platforms that only support .NET Standard 1.x (except .NET Framework). This means Xamarin.Android 7.1, Xamarin.iOS 10.8, and Xamarin.Mac 3.0 will have pathologically inefficient GetHashCode implementations for natural string comparers using an invariant culture. Xamarin.Android 8.0+, Xamarin.iOS 10.14+, and Xamarin.Mac 3.8+ will work properly.

[6.2.2] - 2021-09-25

Changed

  • Bump Rx and Ix dependencies.

[6.2.1] - 2021-09-25

Fixed

  • Explicity support net461 so that shim dlls are not required on that platform.

[6.2.0] - 2021-03-07

Added

  • ignoreOrder option for EquateSequence to ignore order of elements when comparing for sequence equality.

[6.1.0] - 2020-10-24

Added

  • IFullComparer<string>.ToStringComparer to easily create a StringComparer instance.
  • FixedStringComparer to provide StringComparer instances that do not throw on null.
  • Nullable reference type checking.
  • Added AdvancedComparerBase<T> and AdvancedEqualityComparerBase<T> for advanced scenarios.

Fixed

  • Static constructors for derived types are always invoked (so they set DefaultComparer), even if an instance is not ever created. #34

Changed

  • Hash algorithm is now Murmur3.

[6.0.0] - 2019-03-16

See v6 upgrade guide.

Changed

  • Some type names used in the builder pattern. Most users will not be affected.
  • Plain IComparer<T> types must now declare a GetHashCode implementation to be used with Nito.Comparers.
  • ReferenceEqualityComparer is now restricted to reference types.

Added

  • "Fix comparer" extension methods to apply default null handling to misbehaving comparers.

Removed

  • BinarySearch overloads that allowed defining the comparer inline.

[5.0.7] - 2019-02-12

Added

  • Source link support.

[5.0.6] - 2019-02-12

Fixed

  • Corner cases for comparers and equality comparers.
  • IEqualityComparer.GetHashCode when called with an unexpected type.
  • Stack overflow when IComparer.Compare is called for objects of different types that each forward their IComparable implementation to that method.
  • Stack overflow in EqualityComparerBase.IEqualityComparer.Equals corner case.
  • Fixed #12: when comparison methods are passed invalid types (using the nongeneric IEqualityComparer or IComparer interfaces), they could throw InvalidCastException or NullReferenceException.

[5.0.5] - 2017-09-09

Fixed

  • Revert public signing.

[5.0.4] - 2017-08-26

Added

  • Public signing.

[5.0.3] - 2017-08-15

Fixed

  • Work around .NET Core SDK bug.

[5.0.2] - 2017-04-14

Changed

  • Build scripts.

[5.0.0] - 2017-02-27

See v5 upgrade guide.

Changed

  • NuGet package is now Nito.Comparers instead of Comparers.
  • Better names for types used in the "builder" pattern for comparers.
  • allowNulls parameter name changed to specialNullHandling.
  • Equality comparer types moved from Nito.EqualityComparers namespace to Nito.Comparers.

Removed

  • The anonymous comparers have been removed.
  • *Descending methods have been removed; use the descending parameter instead.

[4.0.0] - 2014-05-13

Fixed

  • Bug in determining default comparer for sequences.

Added

  • WPA target.

[3.1.0] - 2014-04-22

Added

  • LINQ/Rx/Ix support with implicit type detection.
  • PCL targets.

Changed

  • Better hash code implementations.

[3.0.0] - 2012-05-16

Added

  • Equality comparers.
  • New targets: .NET 4.5, Silverlight 4 and 5, Metro, and XBox.

Fixed

  • CompoundComparer.GetHashCode

[2.0.2] - 2012-05-01

Fixed

  • NuGet package metadata.

[2.0.1] - 2012-05-01

Fixed

  • Removed contract exceptions when passing null to GetHashCode.

[2.0.0] - 2012-05-01

Changed

  • More consistent API.

Added

  • Sequence comparers.
  • Comparison operators.
  • Ability to override how null is treated.

[1.1.0] - 2012-04-22

Added

  • ToString() implementations to all comparers to assist debugging.

[1.0.0] - 2012-04-21

Initial release.