Handy Powershell snippits
Short and Handy to know
Aliassen and special characters
- % alias foreach
- ? alias where-object
- @ hashtable
- gsv alias Get-Service
Alias to see them all
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cd alias: ls |
Arrays and Generic Lists
Powershell: Everything you wanted to know about arrays (powershellexplained.com)
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$List = [System.Collections.Generic.List[Object]]::new(); $ListItem = [PSCustomObject][Ordered]@{ RemotePowerShellEnabled = $gu.RemotePowerShellEnabled IsSetToFalse = $gu.IsSetToFalse UserPrincipalName = $gu.UserPrincipalName DisplayName = $gu.DisplayName } #end item $List.Add($ListItem) |
Search in a List
For example, consider this $list:
| UserPrincipalName | DisplayName |
| a.jansen@domein.com | Arjen Jansen |
| p.pietersen@domein.com | Peter Pietersen |
If you want to check whether a particular UPN exists in this list, and if so, determine its position
(row number), you can do the following:
$idx = $List.UserPrincipalName.IndexOf("p.pietersen@domein.com")
The variable $idx will contain either -1, which means the UPN was not found, or the row position (starting at 0). If you want to retrieve all the data for that row, you can use $idx like this:
$RowData = $List[$idx]
To display the UserPrincipalName of that row, use:
Write-host $RowData.UserPrincipalName
This will output p.pietersen@domein.com.
Testing for empty string or null value
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if ([string]::IsNullOrWhiteSpace($LastItemAddedtoTeams) -and [string]::IsNullOrEmpty($LastItemAddedtoTeams)) { } |
Hashtables and Herestring (String literal)
Hashtable
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$hash = @{ Number = 1; Shape = "Square"; Color = "Blue"} |
Herstring
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$css = @” <style> Body {enz……} ”@ |
Function example
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<# [CmdletBinding()] supports common paramaters like verbose and confirm Position=0 first value with nog parameter is used as the first input needed ValueFromPipeline ValueFromPipelineByPropertyName If we want to Pipe | something we need this #> function Set-CapSettings{ [CmdletBinding()] param ( [Parameter(Position=0, Mandatory=$true, ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true, HelpMessage="If something is wrong this will be shown")] [string]$NameVariable ) begin { Write-Verbose "Begin begins" } process { Write-Verbose "Processing Process" } end { Write-Verbose "Ending things" } } Set-CapSettings "Captain" -Verbose |
Working With data in Powershell
Pluralsight Working with Data in Powershell
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$htmlreport = $data | convert-html -head $css -Title “Mooie titel” -precontent “<h1>Mooie header</h1>” -postcontent “<p>report generated on $(Get-Date)</p>” Start-proces $htmlreport |
Introduction · Chart.js documentation (chartjs.org)