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Showing content from https://morelinq.github.io/3.0/ref/api/html/M_MoreLinq_MoreEnumerable_WindowLeft__1.htm below:

MoreEnumerableWindowLeftTSource Method

Creates a left-aligned sliding window of a given size over the source sequence.

Namespace:  MoreLinq
Assembly:

MoreLinq (in MoreLinq.dll) Version: 3.0.0

Syntax
public static IEnumerable<IList<TSource>> WindowLeft<TSource>(
	this IEnumerable<TSource> source,
	int size
)
<ExtensionAttribute>
Public Shared Function WindowLeft(Of TSource) ( 
	source As IEnumerable(Of TSource),
	size As Integer
) As IEnumerable(Of IList(Of TSource))
public:
[ExtensionAttribute]
generic<typename TSource>
static IEnumerable<IList<TSource>^>^ WindowLeft(
	IEnumerable<TSource>^ source, 
	int size
)
[<ExtensionAttribute>]
static member WindowLeft : 
        source : IEnumerable<'TSource> * 
        size : int -> IEnumerable<IList<'TSource>> 
Parameters
source
Type: System.Collections.GenericIEnumerableTSource
The sequence over which to create the sliding window.
size
Type: SystemInt32
Size of the sliding window.
Type Parameters
TSource
The type of the elements of source.
Return Value

Type:

IEnumerableIListTSource

A sequence representing each sliding window.

Usage Note

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

IEnumerableTSource

. 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

A window can contain fewer elements than size, especially as it slides over the end of the sequence.

This operator uses deferred execution and streams its results.

Examples
Console.WriteLine(
    Enumerable
        .Range(1, 5)
        .WindowLeft(3)
        .Select(w => "AVG(" + w.ToDelimitedString(",") + ") = " + w.Average())
        .ToDelimitedString(Environment.NewLine));






See Also

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