LinqExtensions.SelectMany Method

Definition

Namespace: Numerics.NET.DataAnalysis.Linq
Assembly: Numerics.NET (in Numerics.NET.dll) Version: 9.0.2

Overload List

SelectMany<T, TResult>(Vector<T>, Func<T, IEnumerable<TResult>>) Projects each element of a vector to a vector and flattens the resulting vectors into one vector.
SelectMany<T, TResult>(Vector<T>, Func<T, Int32, IEnumerable<TResult>>) Projects each element of a vector to a vector incorporating the element's index and flattens the resulting vectors into one vector.
SelectMany<R, C, TResult>(DataFrame<R, C>, Func<DataFrameRow<R, C>, IEnumerable<TResult>>) Projects each row of a data frame into a value.
SelectMany<R, C, TResult>(DataFrame<R, C>, Func<DataFrameRow<R, C>, Int32, IEnumerable<TResult>>) Projects each row of a data frame into a sequence of values, flattens all the sequences into one sequence.
SelectMany<T, TCollection, TResult>(Vector<T>, Func<T, IEnumerable<TCollection>>, Func<T, TCollection, TResult>) Projects each element of a vector to a vector and flattens the resulting vectors into one vector, and applies a selector function to each element of the flattened vector.
SelectMany<T, TCollection, TResult>(Vector<T>, Func<T, Int32, IEnumerable<TCollection>>, Func<T, TCollection, TResult>) Projects each element of a vector to a vector incorporating the element's index and flattens the resulting vectors into one vector, and applies a selector function to each element of the flattened vector.
SelectMany<R, C, TCollection, TResult>(DataFrame<R, C>, Func<DataFrameRow<R, C>, IEnumerable<TCollection>>, Func<DataFrameRow<R, C>, TCollection, TResult>) Projects each row of a data frame into a sequence of values, flattens all the sequences into one sequence, and invokes a selector function on each element of the flattened sequence.
SelectMany<R, C, TCollection, TResult>(DataFrame<R, C>, Func<DataFrameRow<R, C>, Int32, IEnumerable<TCollection>>, Func<DataFrameRow<R, C>, TCollection, TResult>) Projects each row of a data frame into a sequence of values, flattens all the sequences into one sequence, and invokes a selector function on each element of the flattened sequence. The row index is used in the logic of the projection that produces the intermediate sequence.

SelectMany<R, C, TResult>(DataFrame<R, C>, Func<DataFrameRow<R, C>, IEnumerable<TResult>>)

Projects each row of a data frame into a value.
C# 
public static IEnumerable<TResult> SelectMany<R, C, TResult>(
	this DataFrame<R, C> frame,
	Func<DataFrameRow<R, C>, IEnumerable<TResult>> selector
)

Parameters

frame  DataFrame<R, C>
A data frame to invoke a transform function on.
selector  Func<DataFrameRow<R, C>, IEnumerable<TResult>>
A function to apply to each row.

Type Parameters

R
The element type of the row index of the data frame.
C
The element type of the column index of the data frame.
TResult
The type of the value returned by selector.

Return Value

IEnumerable<TResult>
A vector whose elements are the result of invoking selector on each row of the data frame.

Usage Note

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

ArgumentNullException

frame is null.

-or-

selector is null.

SelectMany<R, C, TResult>(DataFrame<R, C>, Func<DataFrameRow<R, C>, Int32, IEnumerable<TResult>>)

Projects each row of a data frame into a sequence of values, flattens all the sequences into one sequence.
C# 
public static IEnumerable<TResult> SelectMany<R, C, TResult>(
	this DataFrame<R, C> frame,
	Func<DataFrameRow<R, C>, int, IEnumerable<TResult>> selector
)

Parameters

frame  DataFrame<R, C>
A data frame to project.
selector  Func<DataFrameRow<R, C>, Int32, IEnumerable<TResult>>
A function to apply to each row.

Type Parameters

R
The element type of the row index of the data frame.
C
The element type of the column index of the data frame.
TResult
The type of the value returned by selector.

Return Value

IEnumerable<TResult>
A vector whose elements are the result of invoking the one-to-many function selector on each row of the data frame.

Usage Note

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

ArgumentNullException

frame is null.

-or-

selector is null.

SelectMany<T, TResult>(Vector<T>, Func<T, IEnumerable<TResult>>)

Projects each element of a vector to a vector and flattens the resulting vectors into one vector.
C# 
public static IEnumerable<TResult> SelectMany<T, TResult>(
	this Vector<T> vector,
	Func<T, IEnumerable<TResult>> selector
)

Parameters

vector  Vector<T>
A vector to project.
selector  Func<T, IEnumerable<TResult>>
A function to apply to each element.

Type Parameters

T
The type of the elements of the vector.
TResult
The type of the result.

Return Value

IEnumerable<TResult>
A vector whose elements are the result of invoking the function selector on each element of vector.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type Vector<T>. 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).

SelectMany<T, TResult>(Vector<T>, Func<T, Int32, IEnumerable<TResult>>)

Projects each element of a vector to a vector incorporating the element's index and flattens the resulting vectors into one vector.
C# 
public static IEnumerable<TResult> SelectMany<T, TResult>(
	this Vector<T> vector,
	Func<T, int, IEnumerable<TResult>> selector
)

Parameters

vector  Vector<T>
A vector to project.
selector  Func<T, Int32, IEnumerable<TResult>>
A function to apply to each element.

Type Parameters

T
The type of the elements of the vector.
TResult
The type of the result.

Return Value

IEnumerable<TResult>
A vector whose elements are the result of invoking the function selector on each element of vector.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type Vector<T>. 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).

SelectMany<R, C, TCollection, TResult>(DataFrame<R, C>, Func<DataFrameRow<R, C>, IEnumerable<TCollection>>, Func<DataFrameRow<R, C>, TCollection, TResult>)

Projects each row of a data frame into a sequence of values, flattens all the sequences into one sequence, and invokes a selector function on each element of the flattened sequence.
C# 
public static IEnumerable<TResult> SelectMany<R, C, TCollection, TResult>(
	this DataFrame<R, C> frame,
	Func<DataFrameRow<R, C>, IEnumerable<TCollection>> collectionSelector,
	Func<DataFrameRow<R, C>, TCollection, TResult> resultSelector
)

Parameters

frame  DataFrame<R, C>
A data frame to project.
collectionSelector  Func<DataFrameRow<R, C>, IEnumerable<TCollection>>
A function to apply to each row.
resultSelector  Func<DataFrameRow<R, C>, TCollection, TResult>
A function to apply to each element of the intermediate sequence.

Type Parameters

R
The element type of the row index of the data frame.
C
The element type of the column index of the data frame.
TCollection
The type of the value returned by collectionSelector.
TResult
The type of the value returned by resultSelector.

Return Value

IEnumerable<TResult>
A vector whose elements are the result of invoking the one-to-many function collectionSelector on each row of the data frame and then applying the transformation resultSelector on each element of this sequence.

Usage Note

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

ArgumentNullException

frame is null.

-or-

collectionSelector is null.

-or-

resultSelector is null.

SelectMany<R, C, TCollection, TResult>(DataFrame<R, C>, Func<DataFrameRow<R, C>, Int32, IEnumerable<TCollection>>, Func<DataFrameRow<R, C>, TCollection, TResult>)

Projects each row of a data frame into a sequence of values, flattens all the sequences into one sequence, and invokes a selector function on each element of the flattened sequence. The row index is used in the logic of the projection that produces the intermediate sequence.
C# 
public static IEnumerable<TResult> SelectMany<R, C, TCollection, TResult>(
	this DataFrame<R, C> frame,
	Func<DataFrameRow<R, C>, int, IEnumerable<TCollection>> collectionSelector,
	Func<DataFrameRow<R, C>, TCollection, TResult> resultSelector
)

Parameters

frame  DataFrame<R, C>
A data frame to project.
collectionSelector  Func<DataFrameRow<R, C>, Int32, IEnumerable<TCollection>>
A function to apply to each row. The second parameter of the function represents the row's index.
resultSelector  Func<DataFrameRow<R, C>, TCollection, TResult>
A function to apply to each element of the intermediate sequence.

Type Parameters

R
The element type of the row index of the data frame.
C
The element type of the column index of the data frame.
TCollection
The type of the value returned by collectionSelector.
TResult
The type of the value returned by resultSelector.

Return Value

IEnumerable<TResult>
A vector whose elements are the result of invoking the one-to-many function collectionSelector on each row of the data frame and then applying the transformation resultSelector on each element of this sequence.

Usage Note

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

ArgumentNullException

frame is null.

-or-

collectionSelector is null.

-or-

resultSelector is null.

SelectMany<T, TCollection, TResult>(Vector<T>, Func<T, IEnumerable<TCollection>>, Func<T, TCollection, TResult>)

Projects each element of a vector to a vector and flattens the resulting vectors into one vector, and applies a selector function to each element of the flattened vector.
C# 
public static IEnumerable<TResult> SelectMany<T, TCollection, TResult>(
	this Vector<T> vector,
	Func<T, IEnumerable<TCollection>> collectionSelector,
	Func<T, TCollection, TResult> resultSelector
)

Parameters

vector  Vector<T>
A vector to project.
collectionSelector  Func<T, IEnumerable<TCollection>>
A function to apply to each element of the input.
resultSelector  Func<T, TCollection, TResult>
A function to apply to each element of the intermediate vector.

Type Parameters

T
The type of the elements of the vector.
TCollection
The type of the intermediate elements.
TResult
The type of the result.

Return Value

IEnumerable<TResult>
A vector whose elements are the result of invoking the one-to-many function collectionSelector on each element of vector, and then applying resultSelector to each element of the intermediate result.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type Vector<T>. 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).

SelectMany<T, TCollection, TResult>(Vector<T>, Func<T, Int32, IEnumerable<TCollection>>, Func<T, TCollection, TResult>)

Projects each element of a vector to a vector incorporating the element's index and flattens the resulting vectors into one vector, and applies a selector function to each element of the flattened vector.
C# 
public static IEnumerable<TResult> SelectMany<T, TCollection, TResult>(
	this Vector<T> vector,
	Func<T, int, IEnumerable<TCollection>> collectionSelector,
	Func<T, TCollection, TResult> resultSelector
)

Parameters

vector  Vector<T>
A vector to project.
collectionSelector  Func<T, Int32, IEnumerable<TCollection>>
A function to apply to each element of the input.
resultSelector  Func<T, TCollection, TResult>
A function to apply to each element of the intermediate vector.

Type Parameters

T
The type of the elements of the vector.
TCollection
The type of the intermediate elements.
TResult
The type of the result.

Return Value

IEnumerable<TResult>
A vector whose elements are the result of invoking the one-to-many function collectionSelector on each element of vector, and then applying resultSelector to each element of the intermediate result.

Usage Note

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