Vista - how do you pass named params to funcs by way of variables

I tried to make the subject make sense but there is so little room to type.


What I'm trying to do is to take the input from the PS prompt; process this
and pass this on to another function which has named parameters. Regardless
of what I've done though the parameters are being bound by position not by
name.


Here is an example based on the helpfile about_function that will show what
I mean.

function name_age
{
param([string]$first = "unknown", [string]$last = "unknown", [int]$age =
0)

Write-Output "In name_age $last, $first : $age"
}

echo 'calling name_age with hard coded parameters'
name_age -age 22 -last brown -first randy

# The above works as expected the parameters are bound by name

$t = '-age 22 -last brown -first randy'
name_age $t

In this case the parameters are bound by position. The results are no
diffierent if you were to break the above string $t into 3 named=value
pairs or 6 individual parameters

Sorry if this was asked previously I was not able to find the answer

thx
bob

Try invoke-expression "name_age $t"

More Info
PS> get-help invoke-expression -detailed

"Bob Landau" <BobLandau@discussions.microsoft.com> wrote in message
news:1CBE320A-5BE5-4ACD-AAF2-C690FF0A4E92@microsoft.com...
>I tried to make the subject make sense but there is so little room to type.
>
>
> What I'm trying to do is to take the input from the PS prompt; process
> this
> and pass this on to another function which has named parameters.
> Regardless
> of what I've done though the parameters are being bound by position not by
> name.
>
>
> Here is an example based on the helpfile about_function that will show
> what
> I mean.
>
> function name_age
> {
> param([string]$first = "unknown", [string]$last = "unknown", [int]$age
> =
> 0)
>
> Write-Output "In name_age $last, $first : $age"
> }
>
> echo 'calling name_age with hard coded parameters'
> name_age -age 22 -last brown -first randy
>
> # The above works as expected the parameters are bound by name
>
> $t = '-age 22 -last brown -first randy'
> name_age $t
>
> In this case the parameters are bound by position. The results are no
> diffierent if you were to break the above string $t into 3 named=value
> pairs or 6 individual parameters
>
> Sorry if this was asked previously I was not able to find the answer
>
> thx
> bob
>
>

Thank you Brandon this does exactly what I asked for. I did look at this
cmdlett briefly and discounted prematurally. I used it like

name_age Invoke-Expression $t

Seems like Invoke-Expression is very similar to using executing dynamic SQL.
At least (until I'm told otherwise) I'll be considering to use it under
similar situations

bob

"Brandon Shell" wrote:

> Try invoke-expression "name_age $t"
>
> More Info
> PS> get-help invoke-expression -detailed
>
> "Bob Landau" <BobLandau@discussions.microsoft.com> wrote in message
> news:1CBE320A-5BE5-4ACD-AAF2-C690FF0A4E92@microsoft.com...
> >I tried to make the subject make sense but there is so little room to type.
> >
> >
> > What I'm trying to do is to take the input from the PS prompt; process
> > this
> > and pass this on to another function which has named parameters.
> > Regardless
> > of what I've done though the parameters are being bound by position not by
> > name.
> >
> >
> > Here is an example based on the helpfile about_function that will show
> > what
> > I mean.
> >
> > function name_age
> > {
> > param([string]$first = "unknown", [string]$last = "unknown", [int]$age
> > =
> > 0)
> >
> > Write-Output "In name_age $last, $first : $age"
> > }
> >
> > echo 'calling name_age with hard coded parameters'
> > name_age -age 22 -last brown -first randy
> >
> > # The above works as expected the parameters are bound by name
> >
> > $t = '-age 22 -last brown -first randy'
> > name_age $t
> >
> > In this case the parameters are bound by position. The results are no
> > diffierent if you were to break the above string $t into 3 named=value
> > pairs or 6 individual parameters
> >
> > Sorry if this was asked previously I was not able to find the answer
> >
> > thx
> > bob
> >
> >
>
>