"RegExp" Class and Object for Regular Expression Support
This section describes the 'RegExp' class and objects used for pattern matches using regular expressions. oRegExp.execute(string) returns a MatchCollection collection object.
VBScript supports a built-in class called "RegExp" to provide regular expression support.
In order to perform a regular express task, you need to create a RegExp object with this syntax:
Set oRegExp = New RegExp
Note that we have to use the "Set" statement to assign an object to a variable.
Then we are ready to use properties and methods supported on the RegExp object, oRegExp:
- oRegRex.Pattern - A String property containing the regular expression string to represent the search pattern.
- oRegRex.Global - A Boolean property representing the global search flag. If turned on,
the search will be applied multiple times on the entire string.
- oRegRex.IgnoreCase - A Boolean property representing the ignore-case search flag. If turned on,
the search will be applied case insensitively.
- oRegRex.Test(string) - A method returning True, if a pattern match is found in the given string.
- oRegRex.Execute(string) - A method returning a MatchCollection collection object
that contains a list of Match objects.
Each Match object represents a pattern match found in the given string.
- oRegRex.Replace(string, replacement) - A method returning a copy of the given string
with each pattern match found and replaced with the replacement string.
The Match object has the following properties:
- oMatch.Length - An integer property representing the number of characters of this pattern match.
- oMatch.FirstIndex - An integer property representing the position where this pattern match was found in the string.
- oMatch.Value - An String property representing this match found in the string.
The "Value" property is the default property.
So the "Value" property will be returned if a Match object is used in a String context.
- oMatch.SubMatches - A SubMatches collection property that contains a list of Strings.
Each string represents a sub pattern match.
Notice that MatchCollection and SubMatches objects are collection objects.
They share same properties and methods as all collection objects. See the next section for details.
Table of Contents
About This Book
Introduction of VBScript - Visual Basic Scripting Edition
Variant Data Type, Subtypes, and Literals
Numeric Comparison Operations and Logical Operations
String Operations - Concatenation and Comparison
Variable Declaration and Assignment Statement
Expression and Order of Operation Precedence
Statement Syntax and Statement Types
Array Data Type and Related Statements
Array References and Array Assignment Statements
Conditional Statements - "If ... Then" and "Select Case"
Loop Statements - "For", "While", and "Do"
"Function" and "Sub" Procedures
Inspecting Variables Received in Procedures
Error Handling Flag and the "Err" Object
►Regular Expression Pattern Match and Replacement
►"RegExp" Class and Object for Regular Expression Support
"MatchCollection" and "SubMatches" Collection Objects
"Set oRegExp = New RegExp" - Creating RegExp Objects
Example of Regular Expression Match and Replacement
scrrun.dll - Scripting Runtime DLL Library
Creating Your Own Classes
IE Web Browser Supporting VBScript
IIS ASP Server Supporting VBScript
WSH (Windows Script Host)
Full Version in PDF/EPUB