Is there a simple way to pass specific named PowerShell parameters through directly to a called function?

Question

I am sure I read somewhere that there is an easy way to pass named parameters from a calling function to a called function without explicitly naming and specifying each parameter.

This is more than just reusing the position; I'm interested in the case where the name of the passed parameters is the same in some cases, but not in others.

I also think there is a way that is not dependent on position.

function called-func {
    param([string]$foo, [string]$baz, [string]$bar)
    write-debug $baz
    write-host $foo,$bar
}

function calling-func {
    param([int]$rep = 1, [string]$foo, [string]$bar)
    1..$rep | %{
        called-func -foo $foo -bar $bar -baz $rep ## <---- Should this be simpler?
    }
}

calling-func -rep 10 -foo "Hello" -bar "World"

What would the method be, and is there a link?

I thought it might have been Jeffrey Snover, but I'm not sure.

I did do some googling first, but since I didn't see the answer already here on SO, I wanted to get it here too anyway. — John Weldon
– John Weldon, Commented Aug 5, 2009 at 15:54
So after some googling, I think the feature I was thinking of had to do with 'splatting' and passing switch parameters. I'll post an answer after I get all the details. — John Weldon
– John Weldon, Commented Aug 5, 2009 at 16:53

JasonMArcher · Accepted Answer · 2009-08-07 03:49:07Z

3

In PowerShell v2 (which admittedly you may not be ready to move to yet) allows you to pass along parameters without knowing about them ahead of time:

called-func $PSBoundParameters

PSBoundParameters is a dictionary of all the parameters that were actually provided to your function. You can remove parameters you don't want (or add I suppose).

answered Aug 7, 2009 at 3:49

JasonMArcher

15.1k22 gold badges59 silver badges53 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

John Weldon Over a year ago

Yes, I can't wait till v2 goes to production :)

John Weldon · Accepted Answer · 2012-01-01 18:55:21Z

2

Well, I think I was confusing a blog post I read about switch parameters. As far as I can tell the best way is to just reuse the parameters like so:

called-func -foo:$foo -bar:$bar

edited Jan 1, 2012 at 18:55

answered Aug 5, 2009 at 19:07

John Weldon

40.9k11 gold badges98 silver badges132 bronze badges

1 Comment

sourcenouveau Over a year ago

The colon syntax is required when foo is a switch parameter. If you pass -foo $foo then called-func will think it's receiving two arguments (the switch foo and a value $foo).

Scott Weinstein · Accepted Answer · 2009-08-05 15:57:25Z

1

How about

called-func  $foo $bar

answered Aug 5, 2009 at 15:57

Scott Weinstein

19.1k15 gold badges83 silver badges117 bronze badges

Collectives™ on Stack Overflow

Is there a simple way to pass specific named PowerShell parameters through directly to a called function?

3 Answers 3

1 Comment

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related