---
title: "indexes(options:ofObjectsPassingTest:)"
framework: foundation
role: symbol
role_heading: Instance Method
path: "foundation/nsorderedset/indexes(options:ofobjectspassingtest:)"
---

# indexes(options:ofObjectsPassingTest:)

Returns the index of an object in the ordered set that passes a test in a given block for a given set of enumeration options.

## Declaration

```swift
func indexes(options opts: NSEnumerationOptions = [], ofObjectsPassingTest predicate: (Any, Int, UnsafeMutablePointer<ObjCBool>) -> Bool) -> IndexSet
```

## Parameters

- `opts`: A bitmask that specifies the options for the enumeration (whether it should be performed concurrently and whether it should be performed in reverse order).
- `predicate`: The block to apply to elements in the ordered set. The block takes three arguments:

## Return Value

Return Value The index whose corresponding value in the ordered set passes the test specified by predicate and opts. If the opts bitmask specifies reverse order, then the last item that matches is returned. Otherwise, the index of the first matching object is returned. If no objects in the ordered set pass the test, returns NSNotFound.

## Discussion

Discussion By default, the enumeration starts with the first object and continues serially through the ordered set to the last object. You can specify concurrent and/or reverse as enumeration options to modify this behavior. important: If the block parameter or s is nil, this method raises an exception.

## See Also

### Accessing Set Members

- [contains(_:)](foundation/nsorderedset/contains(_:).md)
- [enumerateObjects(at:options:using:)](foundation/nsorderedset/enumerateobjects(at:options:using:).md)
- [enumerateObjects(_:)](foundation/nsorderedset/enumerateobjects(_:).md)
- [enumerateObjects(options:using:)](foundation/nsorderedset/enumerateobjects(options:using:).md)
- [firstObject](foundation/nsorderedset/firstobject.md)
- [lastObject](foundation/nsorderedset/lastobject.md)
- [object(at:)](foundation/nsorderedset/object(at:).md)
- [subscript(_:)](foundation/nsorderedset/subscript(_:).md)
- [objects(at:)](foundation/nsorderedset/objects(at:).md)
- [index(of:)](foundation/nsorderedset/index(of:).md)
- [index(of:inSortedRange:options:usingComparator:)](foundation/nsorderedset/index(of:insortedrange:options:usingcomparator:).md)
- [index(ofObjectAt:options:passingTest:)](foundation/nsorderedset/index(ofobjectat:options:passingtest:).md)
- [index(ofObjectPassingTest:)](foundation/nsorderedset/index(ofobjectpassingtest:).md)
- [index(_:ofObjectPassingTest:)](foundation/nsorderedset/index(_:ofobjectpassingtest:).md)
- [indexes(ofObjectsAt:options:passingTest:)](foundation/nsorderedset/indexes(ofobjectsat:options:passingtest:).md)