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Mastering Windows PowerShell Scripting (Second Edition)

Mastering Windows PowerShell Scripting (Second Edition)

By : Chris Dent, Brenton J.W. Blawat
3.3 (8)
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Mastering Windows PowerShell Scripting (Second Edition)

Mastering Windows PowerShell Scripting (Second Edition)

3.3 (8)
By: Chris Dent, Brenton J.W. Blawat

Overview of this book

PowerShell scripts offer a handy way to automate various chores. Working with these scripts effectively can be a difficult task. This comprehensive guide starts from scratch and covers advanced-level topics to make you a PowerShell expert. The first module, PowerShell Fundamentals, begins with new features, installing PowerShell on Linux, working with parameters and objects, and also how you can work with .NET classes from within PowerShell. In the next module, you’ll see how to efficiently manage large amounts of data and interact with other services using PowerShell. You’ll be able to make the most of PowerShell’s powerful automation feature, where you will have different methods to parse and manipulate data, regular expressions, and WMI. After automation, you will enter the Extending PowerShell module, which covers topics such as asynchronous processing and, creating modules. The final step is to secure your PowerShell, so you will land in the last module, Securing and Debugging PowerShell, which covers PowerShell execution policies, error handling techniques, and testing. By the end of the book, you will be an expert in using the PowerShell language.
Table of Contents (18 chapters)
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Arrays


An array contains a set of objects of the same type. Each entry in the array is called an element and each element has an index (position). Indexing in an array starts from 0.

Arrays are an important part of PowerShell. When the return from a command is assigned to a variable, an array will be the result if the command returns more than one object. For example, the following command will yield an array of objects:

$processes = Get-Process 

Note

Array type:In PowerShell, arrays are, by default, given the type System.Object[] (an array of objects where [] is used to signify that it is an array).

Note

Why System.Object? All object instances are derived from a .NET, type or class, and in .NET every object instance is derived from System.Object (including strings and integers). Therefore, an array of System.Object in PowerShell can hold just about anything.

Arrays in PowerShell (and .NET) are immutable, and the size is declared on creation and it cannot be changed. A new array must be created...

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