Class ComparerChainingExtensions

Namespace

ReactiveUI

Assembly

ReactiveUI.dll

Convenience class to help chain selectors onto existing parent comparers.

public static class ComparerChainingExtensions

Inheritance

object

ComparerChainingExtensions

Methods

ThenByDescending<T, TValue>(IComparer<T>?, Func<T, TValue>)

Creates a derived comparer based on the given parent comparer. The returned comparer will sort elements using the parent comparer first. If the parent considers the values equal elements will be sorted in descending order based on the values returned by the provided selector. The selector values will be compared using the default comparer for the return type of the selector.

public static IComparer<T> ThenByDescending<T, TValue>(this IComparer<T>? parent, Func<T, TValue> selector)

Parameters

parent IComparer<T>

The parent comparer to use first.

selector Func<T, TValue>

A function supplying the values for the comparer.

Returns

IComparer<T>

A comparer.

Type Parameters

T

The comparison type.

TValue

The value type.

ThenByDescending<T, TValue>(IComparer<T>?, Func<T, TValue>, IComparer<TValue>)

Creates a derived comparer based on the given parent comparer. The returned comparer will sort elements using the parent comparer first. If the parent considers the values equal elements will be sorted in descending order based on the values returned by the provided selector. The selector values will be compared using the provided comparer or the default comparer for the return type of the selector if no comparer is specified.

public static IComparer<T> ThenByDescending<T, TValue>(this IComparer<T>? parent, Func<T, TValue> selector, IComparer<TValue> comparer)

Parameters

parent IComparer<T>

The parent comparer to use first.

selector Func<T, TValue>

A function supplying the values for the comparer.

comparer IComparer<TValue>

The comparer to use when comparing the values returned by the selector.

Returns

IComparer<T>

A comparer.

Type Parameters

T

The comparison type.

TValue

The value type.

ThenBy<T, TValue>(IComparer<T>?, Func<T, TValue>)

Creates a derived comparer based on the given parent comparer. The returned comparer will sort elements using the parent comparer first. If the parent considers the values equal elements will be sorted in ascending order based on the values returned by the provided selector. The selector values will be compared using the default comparer for the return type of the selector.

public static IComparer<T> ThenBy<T, TValue>(this IComparer<T>? parent, Func<T, TValue> selector)

Parameters

parent IComparer<T>

The parent comparer to use first.

selector Func<T, TValue>

A function supplying the values for the comparer.

Returns

IComparer<T>

A comparer.

Type Parameters

T

The comparison type.

TValue

The value type.

ThenBy<T, TValue>(IComparer<T>?, Func<T, TValue>, IComparer<TValue>)

Creates a derived comparer based on the given parent comparer. The returned comparer will sort elements using the parent comparer first. If the parent considers the values equal elements will be sorted in ascending order based on the values returned by the provided selector. The selector values will be compared using the provided comparer or the default comparer for the return type of the selector if no comparer is specified.

public static IComparer<T> ThenBy<T, TValue>(this IComparer<T>? parent, Func<T, TValue> selector, IComparer<TValue> comparer)

Parameters

parent IComparer<T>

The parent comparer to use first.

selector Func<T, TValue>

A function supplying the values for the comparer.

comparer IComparer<TValue>

The comparer to use when comparing the values returned by the selector.

Returns

IComparer<T>

A comparer.

Type Parameters

T

The comparison type.

TValue

The value type.