ThreadSafeDictionaryTKey, TValueGetOrAddTArg(TKey, FuncTKey, TArg, TValue, TArg) Method

Adds a key/value pair to the ThreadSafeDictionaryTKey, TValue by using the specified addValueFactory if the key does not already exist, and returns either the added or the existing value.

Definition

Namespace: KGySoft.Collections
Assembly: KGySoft.CoreLibraries (in KGySoft.CoreLibraries.dll) Version: 10.0.0

C#

public TValue GetOrAdd<TArg>(
	TKey key,
	Func<TKey, TArg, TValue> addValueFactory,
	TArg factoryArgument
)

VB

Public Function GetOrAdd(Of TArg) ( 
	key As TKey,
	addValueFactory As Func(Of TKey, TArg, TValue),
	factoryArgument As TArg
) As TValue

C++

public:
generic<typename TArg>
TValue GetOrAdd(
	TKey key, 
	Func<TKey, TArg, TValue>^ addValueFactory, 
	TArg factoryArgument
)

F#

member GetOrAdd : 
        key : 'TKey * 
        addValueFactory : Func<'TKey, 'TArg, 'TValue> * 
        factoryArgument : 'TArg -> 'TValue

Parameters

key TKey: The key of the element to add or whose value should be returned.
addValueFactory FuncTKey, TArg, TValue: The delegate to be used to generate the value, if the key does not already exist.
factoryArgument TArg: An argument to pass into addValueFactory.

Type Parameters

TArg: The type of an argument to pass into addValueFactory.

Return Value

TValue
The value for the key. This will be either the existing value for the key if the key is already in the dictionary, or the result of the specified addValueFactory if the key was not in the dictionary.

Exceptions

ArgumentNullException

key or addValueFactory is .