Address off-by-1 error in FindLastIndex (#507)

viceroypenguin · Sep 3, 2023 · 1797da1 · 1797da1
1 parent 23ec78c
commit 1797da1
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diff --git a/Source/SuperLinq/FindLastIndex.cs b/Source/SuperLinq/FindLastIndex.cs
@@ -126,7 +126,7 @@ public static int FindLastIndex<TSource>(this IEnumerable<TSource> source, Func<
 			var i = 0;
 			foreach (var element in source)
 			{
-				if (i >= index.Value)
+				if (i > index.Value)
 					break;
 
 				if (predicate(element))

diff --git a/Tests/SuperLinq.Test/FindLastIndexTest.cs b/Tests/SuperLinq.Test/FindLastIndexTest.cs
@@ -68,7 +68,7 @@ public void FindLastIndexUsesCollectionLengthCorrectly()
 		array[^6] = 3;
 		Assert.Equal(
 			(^6).GetOffset(20),
-			array.FindLastIndex(i => i == 3, ^5));
+			array.FindLastIndex(i => i == 3, ^6));
 	}
 
 	[Fact]