MoreEnumerableOrderedMergeT, TKey, TResult(IEnumerableT, IEnumerableT, FuncT, TKey, FuncT, TResult, FuncT, TResult, FuncT, T, TResult, IComparerTKey) Method

Merges two ordered sequences into one. Additional parameters specify the element key by which the sequences are ordered, the result when element is found in first sequence but not in the second, the result when element is found in second sequence but not in the first, the result when elements are found in both sequences and a method for comparing keys.

Definition

Namespace: MoreLinq
Assembly: MoreLinq (in MoreLinq.dll) Version: 3.4.0+b99a6a8cc504caf2d48372fe54a2f8116c59cd0c

C#

public static IEnumerable<TResult> OrderedMerge<T, TKey, TResult>(
	this IEnumerable<T> first,
	IEnumerable<T> second,
	Func<T, TKey> keySelector,
	Func<T, TResult> firstSelector,
	Func<T, TResult> secondSelector,
	Func<T, T, TResult> bothSelector,
	IComparer<TKey>? comparer
)

VB

<ExtensionAttribute>
Public Shared Function OrderedMerge(Of T, TKey, TResult) ( 
	first As IEnumerable(Of T),
	second As IEnumerable(Of T),
	keySelector As Func(Of T, TKey),
	firstSelector As Func(Of T, TResult),
	secondSelector As Func(Of T, TResult),
	bothSelector As Func(Of T, T, TResult),
	comparer As IComparer(Of TKey)
) As IEnumerable(Of TResult)

C++

public:
[ExtensionAttribute]
generic<typename T, typename TKey, typename TResult>
static IEnumerable<TResult>^ OrderedMerge(
	IEnumerable<T>^ first, 
	IEnumerable<T>^ second, 
	Func<T, TKey>^ keySelector, 
	Func<T, TResult>^ firstSelector, 
	Func<T, TResult>^ secondSelector, 
	Func<T, T, TResult>^ bothSelector, 
	IComparer<TKey>^ comparer
)

F#

[<ExtensionAttribute>]
static member OrderedMerge : 
        first : IEnumerable<'T> * 
        second : IEnumerable<'T> * 
        keySelector : Func<'T, 'TKey> * 
        firstSelector : Func<'T, 'TResult> * 
        secondSelector : Func<'T, 'TResult> * 
        bothSelector : Func<'T, 'T, 'TResult> * 
        comparer : IComparer<'TKey> -> IEnumerable<'TResult>

Parameters

first IEnumerableT: The first input sequence.
second IEnumerableT: The second input sequence.
keySelector FuncT, TKey: Function to extract a key given an element.
firstSelector FuncT, TResult: Function to project the result element when only the first sequence yields a source element.
secondSelector FuncT, TResult: Function to project the result element when only the second sequence yields a source element.
bothSelector FuncT, T, TResult: Function to project the result element when only both sequences yield a source element whose keys are equal.
comparer IComparerTKey: An IComparerT to compare keys.

Type Parameters

T: Type of elements in source sequences.
TKey: Type of keys used for merging.
TResult: Type of elements in the returned sequence.

Return Value

IEnumerableTResult
A sequence with projections from the two input sequences merged according to a key, as in a full outer join.

Usage Note

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

This method uses deferred execution. The behavior is undefined if the sequences are unordered (by key) as inputs.