Book Image

Mastering PowerShell Scripting - Fourth Edition

By : Chris Dent
5 (1)
Book Image

Mastering PowerShell Scripting - Fourth Edition

5 (1)
By: Chris Dent

Overview of this book

PowerShell scripts offer a convenient way to automate various tasks, but working with them can be daunting. Mastering PowerShell Scripting takes away the fear and helps you navigate through PowerShell's capabilities.This extensively revised edition includes new chapters on debugging and troubleshooting and creating GUIs (online chapter). Learn the new features of PowerShell 7.1 by working with parameters, objects, and .NET classes from within PowerShell 7.1. This comprehensive guide starts with the basics before moving on to advanced topics, including asynchronous processing, desired state configuration, using more complex scripts and filters, debugging issues, and error-handling techniques. Explore how to efficiently manage substantial amounts of data and interact with other services using PowerShell 7.1. This book will help you to make the most of PowerShell's automation features, using different methods to parse data, manipulate regular expressions, and work with Windows Management Instrumentation (WMI).
Table of Contents (26 chapters)
24
Other Books You May Enjoy
25
Index

Grouping and measuring

Group-Object is a powerful command that allows you to group objects together based on a property or expression.

Measure-Object supports several simple mathematical operations, such as counting the number of objects, calculating an average, calculating a sum, and so on. Measure-Object also allows characters, words, or lines to be counted in text fields.

The Group-Object command

The Group-Object command shows a group and count for each occurrence of a value in a collection of objects.

Given the sequence of numbers shown, Group-Object creates a Name that holds the value it is grouping, a Count as the number of occurrences of that value, and a Group property as the set of similar values:

PS> 6, 7, 7, 8, 8, 8 | Group-Object
Count    Name                   Group
-----    ----                   -----
    1    6                      {6}
    2    7                      {7, 7}
    3    8                      {8, 8, 8}

The Group property...