HashCodeComparerT 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

SystemObject
  VelocityDbOptimizedPersistable
    VelocityDb.Collection.ComparerVelocityDbComparerT
      VelocityDb.Collection.ComparerHashCodeComparerT

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 HashCodeComparerT type exposes the following members.

Constructors

	Name	Description
	HashCodeComparerT	Initializes a new instance of the HashCodeComparerT 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 VelocityDbComparerKeyCompare(Key, Key).)
	SetComparisonArrayFromObject	Comparators that use comparison arrays need to override this function. Given a Key object, set the comparisonArray bytes (Overrides VelocityDbComparerKeySetComparisonArrayFromObject(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

HashCodeComparerAddLanguageSpecificTextSet("LSTE281331A_0?cs=&lt;|vb=(Of |cpp=&lt;|fs=&lt;'|nu=(");TAddLanguageSpecificTextSet("LSTE281331A_1?cs=&gt;|vb=)|cpp=&gt;|fs=&gt;|nu=)"); Class

Type Parameters

Reference

HashCodeComparerT Class