Method Fold

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, TResult>)

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

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 1 element.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, TResult>)

Returns the result of applying a function to a sequence of 2 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 2 elements.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, T, TResult>)

Returns the result of applying a function to a sequence of 3 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 3 elements.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, T, T, TResult>)

Returns the result of applying a function to a sequence of 4 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 4 elements.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, T, T, T, TResult>)

Returns the result of applying a function to a sequence of 5 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, T, T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, T, T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 5 elements.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, T, T, T, T, TResult>)

Returns the result of applying a function to a sequence of 6 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, T, T, T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, T, T, T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 6 elements.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, T, T, T, T, T, TResult>)

Returns the result of applying a function to a sequence of 7 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, T, T, T, T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, T, T, T, T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 7 elements.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, T, T, T, T, T, T, TResult>)

Returns the result of applying a function to a sequence of 8 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, T, T, T, T, T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, T, T, T, T, T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 8 elements.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, T, T, T, T, T, T, T, TResult>)

Returns the result of applying a function to a sequence of 9 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, T, T, T, T, T, T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, T, T, T, T, T, T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 9 elements.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, T, T, T, T, T, T, T, T, TResult>)

Returns the result of applying a function to a sequence of 10 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, T, T, T, T, T, T, T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, T, T, T, T, T, T, T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 10 elements.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, T, T, T, T, T, T, T, T, T, TResult>)

Returns the result of applying a function to a sequence of 11 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, T, T, T, T, T, T, T, T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, T, T, T, T, T, T, T, T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 11 elements.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, T, T, T, T, T, T, T, T, T, T, TResult>)

Returns the result of applying a function to a sequence of 12 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, T, T, T, T, T, T, T, T, T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, T, T, T, T, T, T, T, T, T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 12 elements.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, T, T, T, T, T, T, T, T, T, T, T, TResult>)

Returns the result of applying a function to a sequence of 13 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, T, T, T, T, T, T, T, T, T, T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, T, T, T, T, T, T, T, T, T, T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 13 elements.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, T, T, T, T, T, T, T, T, T, T, T, T, TResult>)

Returns the result of applying a function to a sequence of 14 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, T, T, T, T, T, T, T, T, T, T, T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, T, T, T, T, T, T, T, T, T, T, T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 14 elements.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, TResult>)

Returns the result of applying a function to a sequence of 15 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 15 elements.

Fold<T, TResult>(IAsyncEnumerable<T>, Func<T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, TResult>)

Returns the result of applying a function to a sequence of 16 elements.

Declaration

public static ValueTask<TResult> Fold<T, TResult>(this IAsyncEnumerable<T> source, Func<T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, TResult> folder)

Parameters

Type	Name	Description
IAsyncEnumerable<T>	source	The sequence of items to fold.
Func<T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, TResult>	folder	Function to apply to the elements in the sequence.

Returns

Type	Description
ValueTask<TResult>	The folded value returned by folder.

Type Parameters

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

Remarks

This operator uses immediate execution and buffers as many items of the source sequence as necessary.

Exceptions

Type	Condition
ArgumentNullException	source or folder is null.
InvalidOperationException	source does not contain exactly 16 elements.