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Mastering PowerShell Scripting

You're reading from Mastering PowerShell Scripting Automate and manage your environment using PowerShell 7.1

Product type Paperback

Published in Jun 2021

Publisher Packt

ISBN-13 9781800206540

Length 788 pages

Edition 4th Edition

Languages

PowerShell

Tools

PowerShell

Concepts

System Administration

Author (1):

Chris Dent

View More author details

Table of Contents (26) Chapters

Preface

1. Introduction to PowerShell

2. Modules and Snap-Ins FREE CHAPTER

3. Working with Objects in PowerShell

4. Operators

5. Variables, Arrays, and Hashtables

6. Conditional Statements and Loops

7. Working with .NET

8. Strings, Numbers, and Dates

9. Regular Expressions

10. Files, Folders, and the Registry

11. Windows Management Instrumentation

12. Working with HTML, XML, and JSON

13. Web Requests and Web Services

14. Remoting and Remote Management

15. Asynchronous Processing

16. Graphical User Interfaces

17. Scripts, Functions, and Script Blocks

18. Parameters, Validation, and Dynamic Parameters

19. Classes and Enumerations

20. Building Modules

21. Testing

22. Error Handling

23. Debugging and Troubleshooting

24. Other Books You May Enjoy

25. Index

Regular Expressions

You can use regular expressions (regex) to perform searches against a text. For the uninitiated, anything but a trivial regular expression can be a confusing mess. To make the topic more difficult, regular expressions differ slightly across different programming languages, platforms, and tools. Given that PowerShell is built on .NET, PowerShell uses .NET-style regular expressions. There are often several different ways to achieve a goal when using regular expressions.

This chapter covers the following topics:

Regex basics
Anchors
Quantifiers
Character classes
Alternation
Grouping
Look-ahead and look-behind
The .NET Regex type
Regex options
Examples of regular expressions

Regular expressions can be complex, but knowing a small set of basic characters provides a useful foundation to build upon.

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Authors (1)

Chris Dent

Chris Dent

Chris Dent is an automation specialist with deep expertise in the PowerShell language. Chris is often found answering questions about PowerShell in both the UK and virtual PowerShell user groups. Chris has been developing in PowerShell since 2007 and has released several modules over the years.

See other products by Chris Dent

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