HashCodeComparer<T> Class

When the type of object being compared is a simple type like a string and you don't care about the sort order, then this comparator is what you want to use. It is similar to using a hash based collection but with less overhead (more compact) This kind of comparator especially shines when you create the BTreeSet/BTreeMap using a comparisonByteArray size of 4

Inheritance Hierarchy

System.Object
  VelocityDb.OptimizedPersistable
    VelocityDb.Collection.Comparer.VelocityDbComparer<T>
      VelocityDb.Collection.Comparer.HashCodeComparer<T>

Namespace: VelocityDb.Collection.Comparer
Assembly: VelocityDb (in VelocityDb.dll) Version: 11.1.0.0 (11.1)

Syntax

C++

Copy

[SerializableAttribute]
public class HashCodeComparer<T> : VelocityDbComparer<T>
where T : IComparable

<SerializableAttribute>
Public Class HashCodeComparer(Of T As IComparable)
	Inherits VelocityDbComparer(Of T)

[SerializableAttribute]
generic<typename T>
where T : IComparable
public ref class HashCodeComparer : public VelocityDbComparer<T>

[<SerializableAttribute>]
type HashCodeComparer<'T when 'T : IComparable> =  
    class
        inherit VelocityDbComparer<'T>
    end

Type Parameters

T: The type of object to compare which must implement IComparable

The HashCodeComparer<T> type exposes the following members.

Constructors

	Name	Description
	HashCodeComparer<T>	Initializes a new instance of the HashCodeComparer<T> class

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Methods

	Name	Description
	Compare	If the Key objects implements IComparable then the NodeKeys are compared that way, otherwise the Id are compared (Overrides VelocityDbComparer<Key>.Compare(Key, Key).)
	SetComparisonArrayFromObject	Comparators that use comparison arrays need to override this function. Given a Key object, set the comparisonArray bytes (Overrides VelocityDbComparer<Key>.SetComparisonArrayFromObject(Key,Byte[], Boolean).)

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Extension Methods

	Name	Description
	ToStringDetails(SessionBase, Boolean)	Overloaded. Object details as a string (Defined by Utilities.)
	ToStringDetails(Schema, TypeVersion, Boolean)	Overloaded. Currently only used by Database Manager (Defined by Utilities.)

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Reference

VelocityDb.Collection.Comparer Namespace

HashCodeComparer<AddLanguageSpecificTextSet("LSTE281331A_0?cs=&lt;|vb=(Of |cpp=&lt;|fs=&lt;'|nu=(");T>AddLanguageSpecificTextSet("LSTE281331A_1?cs=&gt;|vb=)|cpp=&gt;|fs=&gt;|nu=)"); Class

Type Parameters

Reference

HashCodeComparer<T> Class