API Reference > geometry-core > ArraysAndInterfaces > IndexedXYCollection > getVector2dAtCheckedVectorIndex getVector2dAtCheckedVectorIndex MethodAbstract Get from index as a Vector2d getVector2dAtCheckedVectorIndex(index: number, result?: Vector2d): Vector2d | undefined Parameter Type Description index number index of point within the array result Vector2d optional caller-allocated destination Returns - Vector2d | undefined undefined if the index is out of bounds Defined in core/geometry/src/geometry3d/IndexedXYCollection.ts Line 38 Last Updated: 15 June, 2021