January 2008
Intermediate to advanced
688 pages
19h 12m
English
Content preview from Windows PowerShell™ Scripting GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Use of Constants
Constants in Windows PowerShell are like variables with two important exceptions: Their value never changes, and they cannot be deleted. Constants are created by using the Set-Variable cmdlet and specifying the -option argument to be equal to constant.
Tip
When referring to a constant in the body of the script, you must preface it with the dollar sign—just like any other variable. However, when creating the constant (or even a variable) by using the Set-Variable cmdlet, as you specify the name argument you don't include a dollar sign.
In the GetHardDiskDetails.ps1 script that follows, there is a constant named $intDriveType with a value of 3 assigned. This constant is used because the Win32_LogicalDisk WMI class uses a value of 3 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.