EqualityBy<E, F> constructor

EqualityBy<E, F>(
  1. F comparisonKey(
    1. E
    ), [
  2. Equality<F> inner = const DefaultEquality<Never>()
])

Implementation

EqualityBy(F Function(E) comparisonKey,
    [Equality<F> inner = const DefaultEquality<Never>()])
    : _comparisonKey = comparisonKey,
      _inner = inner;