-match within where-object against $args[0]

I can do the following in powershell and it works fine:
get-process | where-object {$_.Name -match "^svc*"}

However, if I create a function that takes arguments, I cannot get it to
work. I've tried all of the following and none of them work properly:

function findproc { get-process | where-object {$_.Name -match
"^$args[0]*"} }
findproc svc

function findproc { get-process | where-object {$_.Name -match
"^$args*"} }
findproc svc

function findproc { get-process | where-object {$_.Name -match
"^$args[0]"} }
findproc svc

function findproc { get-process | where-object {$_.Name -match "^$args"} }
findproc svc

function findproc { get-process | where-object {$_.Name -match $args[0]
} }
findproc ^svc*

Any suggestions? Am I doing something wrong?

$args is not visible inside the where-object filterscript (every scriptblock
has its own $args). Try something like this:

function findproc {
$name = $args[0];
get-process | where-object { $_.Name -match $name }
}

--
greetings
dreeschkind

"Joe D" wrote:

> I can do the following in powershell and it works fine:
> get-process | where-object {$_.Name -match "^svc*"}
>
> However, if I create a function that takes arguments, I cannot get it to
> work. I've tried all of the following and none of them work properly:
>
> function findproc { get-process | where-object {$_.Name -match
> "^$args[0]*"} }
> findproc svc
>
> function findproc { get-process | where-object {$_.Name -match
> "^$args*"} }
> findproc svc
>
> function findproc { get-process | where-object {$_.Name -match
> "^$args[0]"} }
> findproc svc
>
> function findproc { get-process | where-object {$_.Name -match "^$args"} }
> findproc svc
>
> function findproc { get-process | where-object {$_.Name -match $args[0]
> } }
> findproc ^svc*
>
> Any suggestions? Am I doing something wrong?

On Sat, 2 Dec 2006 11:03:00 -0800, Joe D
<JoeD@discussions.microsoft.com> wrote:

>I can do the following in powershell and it works fine:
> get-process | where-object {$_.Name -match "^svc*"}

You can do it more simply:

PS C:\PowerShellScripts> function findproc {get-process $args[0]}
PS C:\PowerShellScripts> findproc svc*

Handles NPM(K) PM(K) WS(K) VM(M) CPU(s) Id ProcessName
------- ------ ----- ----- ----- ------ -- -----------
225 6 3164 5384 60 376.44 1284 svchost
677 14 2436 7656 37 231.06 1332 svchost
2459 597 22940 44112 163 919.06 1528 svchost
108 6 1548 3560 31 6.19 1656 svchost
255 7 2464 5040 38 6.38 1828 svchost

Or, even more simply:

get-process svc*

There are subtle differences between wildcards and regular expressions
that can catch you out.

In this case the wildcard "svc*" is equivalent to the regular
expression "^svc.*" and gives you what I assume you want.

Andrew Watt MVP