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MoreEnumerableFoldT, TResult Method (IEnumerableT, FuncT, TResult)

Returns the result of applying a function to a sequence of 1 element.

Namespace:  MoreLinq
Assembly:  MoreLinq (in MoreLinq.dll) Version: 2.7.0
Syntax
public static TResult Fold<T, TResult>(
	this IEnumerable<T> source,
	Func<T, TResult> folder
)

Parameters

source
Type: System.Collections.GenericIEnumerableT
The sequence of items to fold.
folder
Type: SystemFuncT, TResult
Function to apply to the elements in the sequence.

Type Parameters

T
Type of element in the source sequence
TResult
Type of the result

Return Value

Type: TResult
The folded value returned by folder.

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).
Exceptions
ExceptionCondition
ArgumentNullExceptionsource is null
ArgumentNullExceptionfolder is null
InvalidOperationExceptionsource does not contain exactly 1 element
Remarks
This operator uses immediate execution and effectively buffers as many items of the source sequence as necessary.
See Also