LastIndexOf() [4/4]

int System.Collections.Immutable.ImmutableArray< T >.Builder.LastIndexOf ( T item, int startIndex, int count, IEqualityComparer< T >? equalityComparer )

inline

Definition at line 577 of file ImmutableArray.cs.

        {
            if (count == 0 && startIndex == 0)
            {
                return -1;
            }
            Requires.Range(startIndex >= 0 && startIndex < Count, "startIndex");
            Requires.Range(count >= 0 && startIndex - count + 1 >= 0, "count");
            equalityComparer = equalityComparer ?? EqualityComparer<T>.Default;
            if (equalityComparer == EqualityComparer<T>.Default)
            {
                return Array.LastIndexOf(_elements, item, startIndex, count);
            }
            for (int num = startIndex; num >= startIndex - count + 1; num--)
            {
                if (equalityComparer.Equals(item, _elements[num]))
                {
                    return num;
                }
            }
            return -1;
        }

References System.Collections.Immutable.ImmutableArray< T >.Builder._elements, System.Collections.Immutable.ImmutableArray< T >.Builder.Count, System.count, System.Default, System.item, System.Array.LastIndexOf(), System.Collections.Immutable.Requires.Range(), and System.startIndex.