Simplify internal implementation details of "EndsWith"

Author: atifaziz

MoreLinq/EndsWith.cs

@@ -71,22 +71,14 @@ public static bool EndsWith<T>(this IEnumerable<T> first, IEnumerable<T> second,
  if (first == null) throw new ArgumentNullException(nameof(first));
  if (second == null) throw new ArgumentNullException(nameof(second));
 
- comparer ??= EqualityComparer<T>.Default;
-
  List<T> secondList;
-#pragma warning disable IDE0075 // Simplify conditional expression (makes it worse)
  return second.TryAsCollectionLike() is { Count: var secondCount }
- ? first.TryAsCollectionLike() is { Count: var firstCount } && secondCount > firstCount
- ? false
- : Impl(first, second, secondCount, comparer)
- : Impl(first, secondList = second.ToList(), secondList.Count, comparer);
-#pragma warning restore IDE0075 // Simplify conditional expression
+ ? first.TryAsCollectionLike() is not { Count: var firstCount } || secondCount <= firstCount
+ && EndsWith(second, secondCount)
+ : EndsWith(secondList = second.ToList(), secondList.Count);
 
- static bool Impl(IEnumerable<T> first, IEnumerable<T> second, int count, IEqualityComparer<T> comparer)
- {
- using var firstIter = first.TakeLast(count).GetEnumerator();
- return second.All(item => firstIter.MoveNext() && comparer.Equals(firstIter.Current, item));
- }
+ bool EndsWith(IEnumerable<T> second, int count) =>
+ first.TakeLast(count).SequenceEqual(second, comparer);
  }
  }
 }