Powershell: reference an object property in another object property from within the same object?

Question

Evening folks, just a small question, if it a possibility.

I know I can do it by calling it as an empty object then adding properties one by one.

$Obj = New-Object PSObject
$Obj.name = “hello”
$Obj.type = $Obj.name ‘+’ “world”

Is there a way to do this as one property line?

$Obj = New-Object PSObject -Property @{
Name = “hello”
Type = $Obj.name ‘+’ “world”
}

Answer 1

This might help you accomplish what you're looking for using a PowerShell class:

• Definition

class SomeClass {
    [string] $Name
    [string] $Type

    SomeClass() { }
    SomeClass([string] $Name, [string] $Type) {
        # ctor for custom Type
        $this.Name = $Name
        $this.Type = $Type
    }

    static [SomeClass] op_Explicit([string] $Name) {
        # explicit cast using only `Name`
        return [SomeClass]::new($Name, $Name + 'World')
    }
}

Now you can instantiate using a custom value for the Type:

PS ..\> [SomeClass]@{ Name = 'hello'; Type = 'myCustomType' }

Name  Type
----  ----
hello myCustomType

Or let the explicit operator handle the predefined value for the Type property based on the Name argument:

PS ..\> [SomeClass] 'hello'

Name  Type
----  ----
hello helloWorld