OrderedDictionaryTKey, TValueGetOrAdd(TKey, FuncTValue) Method

Adds a key/value pair to the OrderedDictionaryTKey, TValue by using the specified function, if the key does not already exist as an O(1) operation.

Namespace: GSF.Collections
Assembly: GSF.Core (in GSF.Core.dll) Version: 2.4.181-beta

Syntax

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JavaScript

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public TValue GetOrAdd(
	TKey key,
	Func<TValue> valueFactory
)

Public Function GetOrAdd ( 
	key As TKey,
	valueFactory As Func(Of TValue)
) As TValue

public:
TValue GetOrAdd(
	TKey key, 
	Func<TValue>^ valueFactory
)

member GetOrAdd : 
        key : 'TKey * 
        valueFactory : Func<'TValue> -> 'TValue

function GetOrAdd(key, valueFactory);

View Source

Parameters

key TKey: The key of the element to add.
valueFactory FuncTValue: The function used to generate a value for the key.

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 new value for the key as returned by valueFactory if the key was not in the dictionary.

Exceptions

Exception	Condition
ArgumentNullException	key is null.-or-valueFactory is null.

Reference

OrderedDictionaryTKey, TValue Class

GetOrAdd Overload

GSF.Collections Namespace