Vista - Select object with escaped wildcard

Hello there, I'm confused about how things work in this example:

New-Object psobject| Add-Member noteproperty '*' 'a' -pass | select -
expand '`*'

I think it should work, but it doesn't. Even adding backticks doesn't
effect the result - it still returns error '''Select-Object : Property
"`*" cannot be found.'''

(the reason why I try to solve it because I have some PSObject-s with
automatically added properties and the property names are not
restricted)

Does anybody have the idea how to get the property (with a special
wildcard character in its name) using select-object?

Hi,

well, in this case you can always refer to psobject.Properties:

$(New-Object psobject| Add-Member noteproperty '*' 'a' -
pass).psobject.Properties | Where {$_.Name -eq "*"}

I understand what you are trying to reach and I agree that escape
character should work in this case.

Martin

Thanks for reply, Martin.

I prefer shorter way: (New-Object psobject| Add-Member noteproperty
'*' 'yes' -pass)."*"
but you reminded me in your answer, that there is something I don't
use very ofteh - that there is psobject property with some interesting
methods.

(I was tempted to submit it as a bug, but was not sure if I was right.
I'll wait some time before the submit. )

On 3 lis, 09:35, Martin Zugec <martin.zu...@newsgroup> wrote:

Both psobject and psbase are extremely important if you want to dig
deeper into Powershell and use it to script something it was never
designed for.

Whenever I found myself in situation that I try to do something that
Posh doesn't expect or when I run into situation that Posh tries to be
too smart, I am refering to psobject or psbase.

For me, most typical and painful usage is while handling with XML
documents\elements. While in Posh v2 (my dev station), most properties
are directly supported, if you try to run same code in Posh v1, it
will fail (for example ParentNode, InnerText etc etc).

I remember that I encountered similar situation as yours at one
customer - quick solution was to develop wrapper around Select that
was called Get-Property and was using psobject (there were few other
reasons for this).

Martin

In PowerShell v1, Select-Object -ExpandProperty only works on values that are
arrays:

So in v1 this would work, becuase the property '*' contains an array as the
value:

$array = "a","b"
$x = New-Object psobject | add-member noteproperty '*' $array -PassThru
$x | select -ExpandProperty '*'

In v2 the value does not have to be an array, so you can simply do this:

$x = New-Object psobject | add-member noteproperty '*' 'a' -PassThru
$x | select -ExpandProperty '*'

To solve your issue using v1 you can use foreach-object:

$x = New-Object psobject | add-member noteproperty '*' 'a' -PassThru
$x | ForEach-Object {$_.'*'}

"stej" wrote: