DoubleComparer Class

Members See Also

Represents a comparer for double-precision floating-point numbers with specified tolerance.

Namespace: Extreme.Mathematics
Assembly: Extreme.Numerics.Net40 (in Extreme.Numerics.Net40.dll) Version: 4.2.11333.0 (4.2.12253.0)

Syntax

C#
public class DoubleComparer : IComparer, IComparer<double>

Visual Basic (Declaration)
Public Class DoubleComparer _ Implements IComparer, IComparer(Of Double)

Visual C++
public ref class DoubleComparer : IComparer, IComparer<double>

F#
type DoubleComparer = class interface IComparer interface IComparer<float> end

Remarks

Two apparently equivalent floating-point numbers may not compare equal because of differences in their least significant digits. This is usually caused by round-off error resulting from the finite precision of floating-point representations. For example, the C# expression, (double)1/3 == (double)0.33333, does not compare equal because the division operation on the left-hand side has maximum precision while the constant on the right-hand side is only precise to the visible digits.

Instead, determine if the two sides of a comparison are close enough to equal for your purposes. The DoubleComparer class lets you specify the tolerance within which two numbers are considered equal.

Inheritance Hierarchy

System..::..Object
Extreme.Mathematics..::..DoubleComparer