DFStringColumnApply(String, FuncString, Boolean) Method

Returns a new column with the given name and size containing the items in this column that evaluate to true using the given logical function.

Namespace: CenterSpace.NMath.Core
Assembly: NMath (in NMath.dll) Version: 7.4

Syntax

C++

Copy

public DFStringColumn Apply(
	string name,
	Func<string, bool> function
)

Public Function Apply ( 
	name As String,
	function As Func(Of String, Boolean)
) As DFStringColumn

public:
DFStringColumn^ Apply(
	String^ name, 
	Func<String^, bool>^ function
)

member Apply : 
        name : string * 
        function : Func<string, bool> -> DFStringColumn

Parameters

name String: Name for the new column.
function FuncString, Boolean: A delegate object representing a function that takes a single string parameter and returns a bool.

Return Value

DFStringColumn
A new column with the given name containing the items in this column that evaluate to true using the given logical function.

Remarks

For example, if you apply a function that returns true if a string starts with "b" to a column containing "banana", "apple", "boat", "car", a new column containing "banana", "boat" is returned.

Reference

DFStringColumn Class

Apply Overload

CenterSpace.NMath.Core Namespace