DictionaryExtensionsGetValueOrDefaultTKey, TValue(IEnumerableKeyValuePairTKey, TValue, TKey) Method

Tries to get a value from the provided dictionary for the given key.
See the Examples section of the GetValueOrDefaultTActualValue(IDictionaryString, Object, String, TActualValue) method for some examples.

Definition

Namespace: KGySoft.CoreLibraries
Assembly: KGySoft.CoreLibraries (in KGySoft.CoreLibraries.dll) Version: 9.0.0-preview.1

C#

public static TValue GetValueOrDefault<TKey, TValue>(
	this IEnumerable<KeyValuePair<TKey, TValue>> dictionary,
	TKey key
)

VB

<ExtensionAttribute>
Public Shared Function GetValueOrDefault(Of TKey, TValue) ( 
	dictionary As IEnumerable(Of KeyValuePair(Of TKey, TValue)),
	key As TKey
) As TValue

C++

public:
[ExtensionAttribute]
generic<typename TKey, typename TValue>
static TValue GetValueOrDefault(
	IEnumerable<KeyValuePair<TKey, TValue>>^ dictionary, 
	TKey key
)

F#

[<ExtensionAttribute>]
static member GetValueOrDefault : 
        dictionary : IEnumerable<KeyValuePair<'TKey, 'TValue>> * 
        key : 'TKey -> 'TValue

Parameters

dictionary IEnumerableKeyValuePairTKey, TValue: The dictionary.
key TKey: The key whose value to get.

Type Parameters

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

Return Value

TValue
The found value or the default value of TValue if key was not found in the dictionary.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerableKeyValuePairTKey, 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).

Remarks

Note

If dictionary is neither an IDictionaryTKey, TValue, nor an IReadOnlyDictionaryTKey, TValue instance, then a sequential lookup is performed using a default equality comparer on the keys.