PowerShell Object that is static

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I can create a reference like $x = Get-Process then I can call that with $x. That's great and the processes are updated every time that I type $x, but for what I'm doing I don't want that. I want to grab a snapshot of the processes at a point in time and then be able to query all properties of that capture as it was at that point in time.

So, I'm looking for a way to declare $x in such a way that collects everything at invocation and then when I reference $x, it contains the historic values at that point in time without re-processing Get-Process. How would I do that?

Looks like what you want is to make a clone of an object. To do that, there is a simple way: $y = $x | Select-Object *, but that will not always suffice because it will leave you with a shallow copy.

To be able to also make a deep copy, you may try this function:

function Clone-Object ([object]$obj, [switch]$DeepClone) {
    if ($DeepClone) {
        # create a deep-clone of an object
        # test if the object implements the IsSerializable Interface
        if ([bool]($obj.GetType().IsSerializable)) {      # or: if ([bool]($obj.GetType().Attributes -band 'Serializable')) {
            $ms = New-Object System.IO.MemoryStream
            $bf = New-Object System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
            $bf.Serialize($ms, $obj)
            $ms.Position = 0
            $clone = $bf.Deserialize($ms)
            $ms.Close()
        }
        else {
            # try PSSerializer that serializes to CliXml
            # source: https://stackoverflow.com/a/32854619/9898643
            try {
                $clixml = [System.Management.Automation.PSSerializer]::Serialize($obj, 100)
                $clone  = [System.Management.Automation.PSSerializer]::Deserialize($clixml)
            }
            catch {
                Write-Error "Could not Deep-Clone object of type $($obj.GetType().FullName)"
            }
        }
    }
    else {
        # create a shallow copy of the same type
        # if the object has a Clone() method
        if ($obj -is [System.ICloneable]) {
            $clone = $obj.Clone()
        }
        # test if the object implements the IEnumerable Interface
        elseif ($obj -is [System.Collections.IEnumerable]) {
            try {
                # this only works for objects that have a parameter-less constructor
                $clone = New-Object -TypeName $($obj.GetType().FullName) -ErrorAction Stop
                foreach ($pair in $obj.GetEnumerator()) { $clone[$pair.Key] = $pair.Value }
            }
            catch {
                Write-Error "Could not Clone object of type $($obj.GetType().FullName)"
            }        
        }
        # not Cloneable, not Enumerable..
        else {
            # this returns an object with the properties copied, 
            # but it is NOT OF THE SAME TYPE as the source object
            $clone = $obj | Select-Object *
        }
    }

    return $clone
}

Use it like this:

$y = Clone-Object $x -DeepClone

Hope that helps

about_Classes, Static members (properties and methods) can be invoked by the class itself and do not since this class uses static constructors and methods, there is no need # to instantiate an object All Versions PowerShell can access static methods of . Teams. Q&A for Work. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information

Get-Process returns an array of Process objects. The array length will not change, so if you start another process, it will not show up in your $x. But each of the Process objects will update itself live.

To get a snapshot, you can use Select-Object to single out a couple of properties. Select-Object will create PSCustomObject instances that contain copies of the live values and they will no longer update themselves.

$x = Get-Process | Select-Object Id, ProcessName, StartTime

Get-Process alone is very fast, because it does not actually look at the process properties. If you combine that with Select-Object, the call takes longer, because every selected property of every process must be retrieved and copied. Only select the properties you are interested in, otherwise the call will take a very long time.

Classes (Static Members - Part 6) - Power Tips, Or how to use powershell static methods in our classes? had the following code that allowed us to provision a computer object with a specific� Static properties are properties of class, unlike standard properties, which are properties of an object. To get the static properties of an class, use the Static parameter of the Get-Member cmdlet. For example, the following command gets the static properties of the System.DateTime class. PowerShell.

Can you show an example for the variable being updated? In my case, I did the following:

$x = Get-Process

I opened up notepad after declaring this variable, and did the following:

$x | Where-Object { $_.Name -contains 'notepad' }

This variable did not contain any processes by the name of notepad. But typing the following command (with notepad still open):

( Get-Process ) | Where-Object { $_.Name -contains 'notepad' }

Gave the following output:

Handles  NPM(K)    PM(K)      WS(K)     CPU(s)     Id  SI ProcessName
-------  ------    -----      -----     ------     --  -- -----------
    224      12     2652      13088       0.17   5876   2 notepad

Powershell v5 Classes & Concepts, A PowerShell object is essentially a collection of properties and The keyword " static" is used for properties that don't change while your script� PowerShell. $ServerName = [computer]::GetNextFreeName ($type) 1. $ServerName = [computer]::GetNextFreeName($type) It used the same way of calling a static method in dot net -> the name of the class, followed by two double points, and then the name of the method followed by closing parenthesis.

A practical use case for PowerShell Classes Part 3: PowerShell , Get-Member [[-Name] ] [-Force] [-InputObject ] [-MemberType ] [-Static] [-View ] [] Get-Member helps reinforce an idea that I had a lot of difficulty grappling with in moving from bash to PowerShell scripting, that everything (literally everything) in PowerShell is an object. Let’s take a really simple example: 1.

PowerShell classes – Part 2: Properties – 4sysops, In the following figure, we call a static method on the.NET [Microsoft.Win32.Registry] type. This object has a SetValue () static method which sets a registry value in a given registry hive, subkey, name, and value.

The New-Object cmdlet creates an instance of a .NET Framework or COM object. You can specify either the type of a .NET Framework class or a ProgID of a COM object. By default, you type the fully qualified name of a .NET Framework class and the cmdlet returns a reference to an instance of that class. To create an instance of a COM object, use the ComObject parameter and specify the ProgID of

Comments
  • I just put Get-Process as an illustration, the objects I was using was taking a while to return whenever I invoked it. This is great, you and @Theo's answers are exactly what I was after, thanks.
  • as @Tomalak explained above, the length of the array will not change, but the content of it will.