PanosGreg

## Parameter Sets Examples


# Example #1

# Choose 1 or 2 out of 2
# order is not important

<# Combinations: 3 in total

PanosGreg

function Get-WindowsVersion {
<#
.SYNOPSIS
    It provides the equivalent information to winver.exe
.EXAMPLE
    Get-WindowsVersion
#>
[cmdletbinding()]
param ()

PanosGreg

function Get-WinUpdate {
<#
.SYNOPSIS
    Get a list of all the windows updates on the system

    Note: This function will only show the updates that have a KB ID
          Any hotfixes without an update ID won't be included in the results
.EXAMPLE
    Get-WinUpdate | where Title -like '*cumulative update for windows*'
.EXAMPLE

PanosGreg

function Get-RuntimeDiagnostics {
<#
.SYNOPSIS
    Collect the count and memory size of the .net objects used by a process
.DESCRIPTION
    Collect the count and memory size of the .net objects used by a process

    This function is using the Microsoft.Diagnostics.Runtime .NET library from nuget:
    https://www.nuget.org/packages/Microsoft.Diagnostics.Runtime

PanosGreg

function Get-ADPrincipal {
<#
.SYNOPSIS
    Get users,computers or groups from Active Directory, without the need of the ActiveDirectory module.

    The examples show the use of the .Members property, the .GetGroups() method and also
    the .Add() and .Remove() methods from the group members list along with the .Save() method.
.EXAMPLE
    Get-ADPrincipal *test*

PanosGreg

function Get-AwsTempCredential {
<#
.SYNOPSIS
    This function gets the AWS Access,Secret and Token by assuming the IAM Role that is attached to the current EC2 instance.

    This should be used on EC2 instances only, not on any other VMs. (like Azure,GCP,Hyper-V or VMWare)
    There should be an IAM Role attached to the instance, otherwise it won't work.

    Once you get the temporary credentials, you can then login to AWS with "Set-AWSCredential"
    or alternatively you can use the .LoginAWS() method from this object.

PanosGreg

## Drilling down into the Microsoft.Extensions.Configuration namespace from a PowerShell point-of-view

## Note: the inspiration for this came up by watching a .net video about configuration from Chris Ayers
#        [.NET Configuration In Depth | .NET Conf 2023](https://www.youtube.com/watch?v=aOXaBZFB0-0)



## How to load a .dll which has some dependencies
## you just have to get the package from nuget which will also retrieve all of the dependencies

PanosGreg

# from a string array get the uniques and retain the order

# get the unique items from a string array with case-insensitive and also retain the current order

# this approach is to work-around the gap from Select-Object -Unique, which compares the object and not the property
# in the case of string arrays.
# and also to retain the order, whereas the Sort-Object -Unique would change the order

# source string array

PanosGreg

function ConvertTo-ClassDefinition {
<#
.EXAMPLE
    $hash = @{name='aa';size=10}
    $code = $hash | ConvertTo-ClassDefinition
    Invoke-Expression $code
    $h = [My_Hashtable]::new()
    # create and load a class from a hashtable
.EXAMPLE
    $obj = [pscustomobject]@{name='aa';size=10}

PanosGreg

function Invoke-ForEachParallel {
<#
.SYNOPSIS
    This is a wrapper around foreach-parallel from PS v7, but with progress bars.

.DESCRIPTION
    This is a wrapper around foreach-parallel from PS v7, but with progress bars.

    You can run a scriptblock against an array of objects, just like foreach,
    but it also shows multi-threaded progress bars, one for every thread.