StringExtensionsIndexOfPreviousNot(String, FuncChar, Boolean, Int32) Method

Searches a string from right to left for the next instance of a character that does not pass the given delegate function.

Definition

Namespace: Gemstone.StringExtensions
Assembly: Gemstone.Common (in Gemstone.Common.dll) Version: 1.0.143 -- Release Build+524337d392fd5616b12b50022b004322b9e7c330
public static int IndexOfPreviousNot(
	this string? value,
	Func<char, bool> characterTestFunction,
	int startIndex = 0
)

Parameters

value  String
Input string to process.
characterTestFunction  FuncChar, Boolean
The character test to use.
startIndex  Int32  (Optional)
The index in value from which to begin testing characters. Typically length of value minus 1."

Return Value

Int32
The index of the character within value or (-1) if not found.

Usage Note

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