---
title: "NSMapMember(_:_:_:_:)"
framework: foundation
role: symbol
role_heading: Function
path: "foundation/nsmapmember(_:_:_:_:)"
---

# NSMapMember(_:_:_:_:)

Indicates whether a given table contains a given key.

## Declaration

```swift
func NSMapMember(_ table: NSMapTable<AnyObject, AnyObject>, _ key: UnsafeRawPointer, _ originalKey: UnsafeMutablePointer<UnsafeMutableRawPointer?>?, _ value: UnsafeMutablePointer<UnsafeMutableRawPointer?>?) -> Bool
```

## Return Value

Return Value true if table contains a key equal to key, otherwise false.

## Discussion

Discussion If table contains a key equal to key, originalKey is set to key, and value is set to the value that table maps to key.

## See Also

### Related Documentation

- [NSNextMapEnumeratorPair(_:_:_:)](foundation/nsnextmapenumeratorpair(_:_:_:).md)
- [NSAllMapTableValues(_:)](foundation/nsallmaptablevalues(_:).md)
- [NSMapGet(_:_:)](foundation/nsmapget(_:_:).md)
- [NSEnumerateMapTable(_:)](foundation/nsenumeratemaptable(_:).md)
- [NSAllMapTableKeys(_:)](foundation/nsallmaptablekeys(_:).md)

### Functions

- [NSAllMapTableKeys(_:)](foundation/nsallmaptablekeys(_:).md)
- [NSAllMapTableValues(_:)](foundation/nsallmaptablevalues(_:).md)
- [NSCompareMapTables(_:_:)](foundation/nscomparemaptables(_:_:).md)
- [NSCopyMapTableWithZone(_:_:)](foundation/nscopymaptablewithzone(_:_:).md)
- [NSCountMapTable(_:)](foundation/nscountmaptable(_:).md)
- [NSCreateMapTable(_:_:_:)](foundation/nscreatemaptable(_:_:_:).md)
- [NSCreateMapTableWithZone(_:_:_:_:)](foundation/nscreatemaptablewithzone(_:_:_:_:).md)
- [NSEndMapTableEnumeration(_:)](foundation/nsendmaptableenumeration(_:).md)
- [NSEnumerateMapTable(_:)](foundation/nsenumeratemaptable(_:).md)
- [NSFreeMapTable(_:)](foundation/nsfreemaptable(_:).md)
- [NSMapGet(_:_:)](foundation/nsmapget(_:_:).md)
- [NSMapInsert(_:_:_:)](foundation/nsmapinsert(_:_:_:).md)
- [NSMapInsertIfAbsent(_:_:_:)](foundation/nsmapinsertifabsent(_:_:_:).md)
- [NSMapInsertKnownAbsent(_:_:_:)](foundation/nsmapinsertknownabsent(_:_:_:).md)
- [NSMapRemove(_:_:)](foundation/nsmapremove(_:_:).md)