Vista - trouble with count / length of array filled from filtered ls

hi,

i have been scripting PS off and on over the past year or so. the
other day i ran across a bug in a script of mine that I'm having
trouble understanding. hoping someone can help me get a handle on it.

if I do the following interactively in a powershell window:
$alist = ls . | where {$_.name -match ".sql$"}
$alist.count
it works just fine and returns 2 in this case.

trying to do the same thing in a script (the main difference ist that
I've passed the pattern as a parameter
param(
[string] $match = ""
)
) i end up with an array that appears to contain an item when I echo
it, but shows a count of 0.

any idea what could be going wrong here? i borrowed the technique from
a different script of mine which has been working fine for months.

cheers,

Tim Hanson

Hi Tim,

the diollar sign is a regex metacharacter (denotes end of line). You need
to escape it for -match to succssed:


ls . | where {$_.name -match ".sql\$"}


You can also get the files without piping to where-object or without using
regex at all:

ls *.sql



---
Shay Levy
Windows PowerShell MVP
http://blogs.microsoft.co.il/blogs/ScriptFanatic
PowerShell Toolbar: http://tinyurl.com/PSToolbar



T> hi,
T>
T> i have been scripting PS off and on over the past year or so. the
T> other day i ran across a bug in a script of mine that I'm having
T> trouble understanding. hoping someone can help me get a handle on it.
T>
T> if I do the following interactively in a powershell window:
T> $alist = ls . | where {$_.name -match ".sql$"}
T> $alist.count
T> it works just fine and returns 2 in this case.
T> trying to do the same thing in a script (the main difference ist that
T> I've passed the pattern as a parameter
T> param(
T> [string] $match = ""
T> )
T> ) i end up with an array that appears to contain an item when I echo
T> it, but shows a count of 0.
T>
T> any idea what could be going wrong here? i borrowed the technique
T> from a different script of mine which has been working fine for
T> months.
T>
T> cheers,
T>
T> Tim Hanson
T>