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How to write better PowerShell scripts

Most PowerShell users have had the opportunity to create complex scripts. While we are plodding along, we tend not to think about aesthetics, commenting or writing code in a timely manner. We want to finish the script in every circumstance, so we can continue with our day or night.
Most PowerShell scripters are unaware that structuring complex scripts in simple, well-organized ways and adding good comments can save a lot of time.
Let’s now discuss how to use the help command, aliases and commenting. In general, making sure everything is properly structured will allow us to create more efficient PowerShell commands in less time.
Common Ways to Write Clean Code
When writing PowerShell scripts, there are a few things you should remember.
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Training begins with thinking about the script before you actually write it. What kind of script is it? What is the script’s ultimate goal? Is this the only person who will ever use this code? Can I break this script into smaller ones?
When writing scripts, we tend not to think about the deployment method that the script will use. We need to ask ourselves if this script will be used daily, how important is the script runtime, and if this script will be given to other system administrators.
These three questions will determine how we write our script. It is crucial to know the script runtime if the script will be deployed on hundreds or thousands of systems using an automated deployment system. It will determine how long the deployment will take.
This is closely related to the question of whether the script will be run daily. If so, the script’s complexity and size are very important. This makes it much easier to troubleshoot any issue.
Am I the only one who will take care of this script? This is a crucial question, especially in Enterprise environments. Let’s say that we have multiple teams that manage automation infrastructure. All team members must share scripts and help each other.
This is the time to really think about commenting on actual code to make it more understandable by any 3rd parties who might be called upon to troubleshoot the script or improve it.
If we have a complex script that could end up with several hundred, or even thousands of lines of code, it might be worth splitting the script into multiple scripts. This will make it much easier to troubleshoot the script. We won’t look at the whole script as a whole. Instead, we will treat each function or block of script as a module or an independent script that is part of a larger solution.
It’s easier to write smaller scripts with comments and using analiases to shorten or eliminate the actual command. This will allow us to have more control over script deployment. It will be much easier to deploy a portion of a large script if it is split into multiple scripts than deploying the entire script repeatedly.
Help, Aliases, Comments
The help command is one the most powerful PowerShell commands because it provides information about any command we are trying to execute — and even some code examples! Let’s look at some examples of how the help command can be used.
You can access the help command by either using the Get-Help cmdlet, or simply typing help.
It also accepts wildcards. Even if you don’t know the exact command, you can type a portion of it and use the wildcard for help.
We will be able to access a complete list of help files if we use “Get Help about*”.

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