February 2019
Intermediate to advanced
626 pages
15h 51m
English
Content preview from Mastering Windows PowerShell Scripting - Third Edition
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The Allow attributes
The Allow attributes are most commonly used when a parameter is mandatory. If a parameter is mandatory, PowerShell will automatically disallow assignment of empty values, that is, empty strings and empty arrays. The Allow attributes can be used to modify that behavior. The attributes make it possible to require a parameter, but still allow empty values.
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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.