CollectionExtensionsGetOrDefaultTKey, TValue(IDictionaryTKey, TValue, TKey, FuncTKey, TValue) Method

Attempts to get the value for the given key and returns the default value instead if the key does not exist in the IDictionaryTKey, TValue.

Definition

Namespace: Gemstone.Collections.CollectionExtensions
Assembly: Gemstone.Common (in Gemstone.Common.dll) Version: 1.0.147 -- Release Build+759c9d29b79c81f10905de8f58b653be932045f0

C#View Source Request Example

public static TValue GetOrDefault<TKey, TValue>(
	this IDictionary<TKey, TValue> dictionary,
	TKey key,
	Func<TKey, TValue> defaultValueFactory
)

VBView Source Request Example

<ExtensionAttribute>
Public Shared Function GetOrDefault(Of TKey, TValue) ( 
	dictionary As IDictionary(Of TKey, TValue),
	key As TKey,
	defaultValueFactory As Func(Of TKey, TValue)
) As TValue

C++View Source Request Example

public:
[ExtensionAttribute]
generic<typename TKey, typename TValue>
static TValue GetOrDefault(
	IDictionary<TKey, TValue>^ dictionary, 
	TKey key, 
	Func<TKey, TValue>^ defaultValueFactory
)

JavaScriptView Source Request Example

JavaScript does not support generic types or methods.

Parameters

dictionary IDictionaryTKey, TValue: The dictionary to check for the given key.
key TKey: The key to be checked for the existence of a value.
defaultValueFactory FuncTKey, TValue: The function used to generate the default value if no value exists for the given key.

Type Parameters

TKey: The type of the keys in the dictionary.
TValue: The type of the values in the dictionary.

Return Value

TValue
The value of the key in the dictionary or the default value if no such value exists.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IDictionaryTKey, TValue. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).