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Regular expressions (regex) are used to perform pattern matching against 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. Regular expressions can be complex and there is often more than one way to achieve a goal, variation in expressions developed by different people is common.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...
