update pwsh resource page
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---
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title: 'PowerShell Read Only Class Properties'
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date: 2017-07-19T11:15:47+01:00
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showDateUpdated: true
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lastmod: 2022-01-11T14:37:54+01:00
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draft: false
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categories: ['PowerShell']
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tags: ['class', 'read-only', 'properties']
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# lastmod: 2021-12-23T11:15:47+01:00
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# showDateUpdated: true
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@ -351,7 +356,28 @@ And that's exactly what we wanted. We have hidden the the property `_Ready` and
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I personally like using _script properties_. But I take is on step further and create all public properties with a
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separate method:
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{% gist OCram85/d673764614438493afaa5cd413999436 AddPublicMember.ps1 %}
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```powershell
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hidden AddPublicMember() {
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$Members = $this | Get-Member -Force -MemberType Property -Name '_*'
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ForEach ($Member in $Members) {
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$PublicPropertyName = $Member.Name -replace '_', ''
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# Define getter part
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$Getter = "return `$this.{0}" -f $Member.Name
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$Getter = [ScriptBlock]::Create($Getter)
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# Define setter part
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$Setter = "Write-Warning 'This is a readonly property.'"
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$Setter = [ScriptBlock]::Create($Setter)
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$AddMemberParams = @{
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Name = $PublicPropertyName
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MemberType = 'ScriptProperty'
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Value = $Getter
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SecondValue = $Setter
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}
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$this | Add-Member @AddMemberParams
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}
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}
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```
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This avoids making errors if I work with multiple constructors. Without a method like `AddPublicMember` you are
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forced to define each public property in every constructor method.
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@ -360,6 +386,48 @@ All you have to do is to add the `AddPublicMember`method to your class definitio
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Finally our death start class looks like this:
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{{< gist OCram85 d673764614438493afaa5cd413999436>}}
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```powershell
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Class DeathStar {
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[String]$Class = 'Space battle station'
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[Int]$Width = '160000'
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[String[]]$HyperDriveRating = @('Class 4', 'Class 20')
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$Crew = @{
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ImperialNavy = 342953
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Stormtroopers = 25984
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}
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hidden [String]$_Ready = $null
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So what do you think? - Feel free to discuss this in the comment section down below.
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hidden AddPublicMember() {
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$Members = $this | Get-Member -Force -MemberType Property -Name '_*'
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ForEach ($Member in $Members) {
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$PublicPropertyName = $Member.Name -replace '_', ''
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# Define getter part
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$Getter = "return `$this.{0}" -f $Member.Name
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$Getter = [ScriptBlock]::Create($Getter)
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# Define setter part
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$Setter = "Write-Warning 'This is a readonly property.'"
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$Setter = [ScriptBlock]::Create($Setter)
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$AddMemberParams = @{
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Name = $PublicPropertyName
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MemberType = 'ScriptProperty'
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Value = $Getter
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SecondValue = $Setter
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}
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$this | Add-Member @AddMemberParams
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}
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}
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DeathStar () {
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$this.AddPublicMember()
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$this._Ready = $true
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}
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DeathStar ([int]$ImperialNavy, [int]$Stormtroopers) {
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$this.AddPublicMember()
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$this.Crew.ImperialNavy = $ImperialNavy
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$this.Crew.StormTroopers = $Stormtroopers
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$this._Ready = $true
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}
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}
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```
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@ -1,8 +1,8 @@
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---
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title: 'A Journey to the PowerShell Citadel'
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title: 'A Journey to the PowerShell Citadel ✨🧙'
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date: 2017-12-14T14:37:54+01:00
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showDateUpdated: true
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lastmod: 2021-12-22T14:37:54+01:00
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lastmod: 2022-01-11T08:37:54+01:00
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draft: false
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categories: ['PowerShell']
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tags: ['resources']
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@ -14,7 +14,8 @@ draft: false
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## The Journey Begins Now Young Novice
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In this section you find the most basic stuff. It's aimed to help beginners who just got in touch with PowerShell.
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All external links refer to the latest production ready PowerShell version. This is currently the version `5.1`.
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All external links refer to the latest production ready PowerShell version.
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This is currently the version `7.2.1 LTS`. If you're force to use PSSnapins you still have to use the version `5.1`.
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### Docs
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@ -31,9 +32,9 @@ All external links refer to the latest production ready PowerShell version. This
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[official documentation]: https://docs.microsoft.com/en-us/powershell
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[docs.microsoft.com]: https://docs.microsoft.com
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[powershell reference]: https://docs.microsoft.com/en-us/powershell/scripting/powershell-scripting?view=powershell-5.1
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[about pages]: https://docs.microsoft.com/de-de/powershell/module/microsoft.powershell.core/about/about_aliases?view=powershell-5.1
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[the monad manifesto]: https://www.gitbook.com/book/devops-collective-inc/the-monad-manifesto-annotated/details
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[powershell reference]: https://docs.microsoft.com/en-us/powershell/scripting/overview?view=powershell-7.2
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[about pages]: https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about?view=powershell-7.2
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[the monad manifesto]: https://devops-collective-inc.gitbook.io/the-monad-manifesto-annotated/
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{{< note >}}
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You can also display the \_about\_ pages with a PowerShell function itself. To get a list of all about
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@ -51,7 +52,7 @@ Google around or ask questions in communities like:
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- [PowerShell.org] - A very helpful and friendly community.
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[stackoverflow]: https://stackoverflow.com/questions/tagged/powershell
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[powershell.org]: https://powershell.org/forums
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[powershell.org]: https://forums.powershell.org/
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## Acolyte
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@ -93,20 +94,23 @@ In this phase you should also start working with additional tools like:
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- [Visual Studio Code](https://code.visualstudio.com/)
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- CI/CD Environments:
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- [Github](https://github.com/)
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- [Phabricator](https://www.phacility.com/phabricator/)
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- [Jenkins](https://jenkins.io/)
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- [Gitea](https://gitea.io/)
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- [Drone](https://www.drone.io/)
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- [AppVeyor](https://www.appveyor.com/)
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- [GoCD](https://www.gocd.org/)
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- Helper
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- [ILSpy](http://ilspy.net/)
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- Coverage Reports
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- [Coveralls.io](https://coveralls.io/)
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- [Codecov](https://codecov.com)
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{{< note >}}
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If you develop open source projects I recommend using [Github](https://github.com/) in combination with
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[AppVeyor](https://www.appveyor.com/). You don't need to maintain any additional infrastructure and they are free
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for public repositories. Otherwise I like working with Phabricator as _Git Server_ and project coordination.
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If you take this path you definitely need a build server like Jenkins.
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If you develop open source projects I recommend using [Github](https://github.com/) in combination with its
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[Actions](https://github.com/features/actions) feature or [Drone](https://www.drone.io/).
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You don't need to maintain any additional infrastructure and they are free for public repositories.
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Otherwise I like working with Gitea as _Git Server_ and project coordination. If you take this path you definitely
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need a build server Drone. I definitely recommend running these as container in a Docker or even Kubernetes
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environment.
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{{< /note >}}
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## Maester
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@ -121,16 +125,15 @@ spread the work of PowerShell while teaching others!
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Microsoft and PowerShell knowledge.
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- [DonJones.com] - If you never heard about DonJones I can't help you. He is one of the biggest
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maesters in the PowerShell citadel and a great inspiration.
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- [Kevin Marquette on PowerShell Theory] - A great blog about various PowerShell
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topics.
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- [PowerShellExplained] - A great blog about various PowerShell topics by Kevin Marquette.
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- [keithhill.wordpress.com] - One of the 4 maintainers of the [PowerShell Extension]
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for [VS Code].
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- [xainey.github.io] - Michael Willis blog contains great articles about PowerShell classes,
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module creation and building frontend for PowerShell. It's high quality content and easy to follow expert topics.
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[dille.name]: http://dille.name
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[donjones.com]: https://donjones.com/
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[kevin marquette on powershell theory]: https://kevinmarquette.github.io/
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[donjones.com]: https://donjones.com/powershell/
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[powershellexplained]: https://powershellexplained.com/
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[keithhill.wordpress.com]: http://rkeithhill.wordpress.com
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[xainey.github.io]: https://xainey.github.io/
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[powershell extension]: https://github.com/PowerShell/vscode-powershell
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@ -138,7 +141,7 @@ spread the work of PowerShell while teaching others!
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### Get in touch with the Archmaesters
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Take a look at the [PowerShell Slack Team](http://slack.poshcode.org/) if your searching other active PowerShell experts.
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Take a look at the [PowerShell Slack Team](http://powershell.slack.com/) if your searching other active PowerShell experts.
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## Additional Resources
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