Static method: CustomEqualityComparer<T> By<TBy>(Func<T, TBy>, Func<TBy, TBy, bool>, Func<TBy, int>)

• Declared in: RT.Util.CustomEqualityComparer<T>

Declaration

public static CustomEqualityComparer<T> By<TBy>(
    Func<T, TBy> selector,
    Func<TBy, TBy, bool> comparison = null,
    Func<TBy, int> getHashCode = null
)

Summary

Creates and returns an equality comparer that compares the equality of objects by comparing the equality of the result of a selector function.

Generic type parameters

TBy	This type parameter is not documented.

Parameters

Func<T, TBy>	selector	Function selecting the actual value to be compared.
Func<TBy, TBy, bool>	comparison	Function used to compare values for equality. If null, will use IEquatable if implemented, or the object's Equals override.
Func<TBy, int>	getHashCode	Function used to compute hash codes. If null, will use IEquatable if implemented, or the object's GetHashCode override.