M_CodeJam_Collections_CollectionExtensions_DefaultIfEmpty__2_1

CollectionExtensions.DefaultIfEmpty(TKey, TValue) Method (Dictionary(TKey, TValue), TKey, TValue, IEqualityComparer(TKey))

Returns a new dictionary with default value if the dictionary is empty.

Namespace: CodeJam.Collections
Assembly: CodeJam (in CodeJam.dll) Version: 2.1.0.0

Syntax

C#

public static Dictionary<TKey, TValue> DefaultIfEmpty<TKey, TValue>(
	this Dictionary<TKey, TValue> dictionary,
	TKey defaultKey,
	TValue defaultValue,
	IEqualityComparer<TKey> comparer
)

VB

<ExtensionAttribute>
Public Shared Function DefaultIfEmpty(Of TKey, TValue) ( 
	dictionary As Dictionary(Of TKey, TValue),
	defaultKey As TKey,
	defaultValue As TValue,
	comparer As IEqualityComparer(Of TKey)
) As Dictionary(Of TKey, TValue)

F#

[<ExtensionAttribute>]
static member DefaultIfEmpty : 
        dictionary : Dictionary<'TKey, 'TValue> * 
        defaultKey : 'TKey * 
        defaultValue : 'TValue * 
        comparer : IEqualityComparer<'TKey> -> Dictionary<'TKey, 'TValue> 

Parameters

 

dictionary

Type: System.Collections.Generic.Dictionary(TKey, TValue)
The dictionary.

defaultKey

Type: TKey
The default key.

defaultValue

Type: TValue
The default value.

comparer

Type: System.Collections.Generic.IEqualityComparer(TKey)
The comparer.

Type Parameters

 

TKey

The type of the key.

TValue

The type of the value.

Return Value

Type: Dictionary(TKey, TValue)
A new dictionary with default key and value if the dictionary is empty.

Usage Note

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

See Also

Reference

CollectionExtensions Class
DefaultIfEmpty Overload
CodeJam.Collections Namespace