KGy SOFT Core Libraries Help
Thread
Adds a key/value pair to the ThreadSafeDictionaryTKey, TValue if the key does not already exist,
or updates a key/value pair in the ThreadSafeDictionaryTKey, TValue by using the specified updateValueFactory if the key already exists.
Definition
Namespace: KGySoft.Collections
Assembly: KGySoft.CoreLibraries (in KGySoft.CoreLibraries.dll) Version: 10.0.0
The new value for the key. This will be either addValue (if the key was absent) or the result of updateValueFactory (if the key was present).
Assembly: KGySoft.CoreLibraries (in KGySoft.CoreLibraries.dll) Version: 10.0.0
C#
public TValue AddOrUpdate(
TKey key,
TValue addValue,
Func<TKey, TValue, TValue> updateValueFactory
)VB
Public Function AddOrUpdate (
key As TKey,
addValue As TValue,
updateValueFactory As Func(Of TKey, TValue, TValue)
) As TValueC++
public:
TValue AddOrUpdate(
TKey key,
TValue addValue,
Func<TKey, TValue, TValue>^ updateValueFactory
)F#
member AddOrUpdate :
key : 'TKey *
addValue : 'TValue *
updateValueFactory : Func<'TKey, 'TValue, 'TValue> -> 'TValue Parameters
- key TKey
- The key to be added or whose value should be updated.
- addValue TValue
- The value to be added for an absent key.
- updateValueFactory FuncTKey, TValue, TValue
- A delegate used to generate a new value for an existing key based on the key's existing value.
Return Value
TValueThe new value for the key. This will be either addValue (if the key was absent) or the result of updateValueFactory (if the key was present).
Exceptions
| ArgumentNullException | key or updateValueFactory is . |