Vista - why is a function level variable cleared in the Trap statement

Is there any reason why the object created within the trap is cleared once it
moves out of the trap. Below is an working sample code. In this $objArray
will not have the $output object created inside the trap. Once the function
is finished execution. Wanted to know why this happens and how to avoid it.

function Test
{
$arr = "Mangoes","Apples"
$insideArr = "ABC", "PQR"
$objArray = @()

foreach($a in $arr)
{
trap {continue}
&{trap{
write-Host "its here"
$output = New-Object object
Add-Member -inputobject $output -membertype NoteProperty -name
"Name" -value "here mangoes"
$objArray += $output
break}

if($a -eq "Mangoes")
{
throw "Error happening"
}
else
{
$output = new-Object Object
add-Member -inputObject $output -membertype NoteProperty
-name "Name" $a
$objArray += $output
}
write-Host $a}

}


return $objArray
}

return test

break

$objArray = test;

foreach($arrItem in $objArray)
{
$arrItem.Name
}

Hi AdityaKir,


Variables created inside TRAP are local to the trap scope.

You can workaround it by prefixing $objArray calls with a scope name:

$scriptbjArray = @()

and

$scriptbjArray += $output



For more help:

PS > help about_scope



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



A> Is there any reason why the object created within the trap is cleared
A> once it moves out of the trap. Below is an working sample code. In
A> this $objArray will not have the $output object created inside the
A> trap. Once the function is finished execution. Wanted to know why
A> this happens and how to avoid it.
A>
A> function Test
A> {
A> $arr = "Mangoes","Apples"
A> $insideArr = "ABC", "PQR"
A> $objArray = @()
A> foreach($a in $arr)
A> {
A> trap {continue}
A> &{trap{
A> write-Host "its here"
A> $output = New-Object object
A> Add-Member -inputobject $output -membertype NoteProperty
A> -name
A> "Name" -value "here mangoes"
A> $objArray += $output
A> break}
A> if($a -eq "Mangoes")
A> {
A> throw "Error happening"
A> }
A> else
A> {
A> $output = new-Object Object
A> add-Member -inputObject $output -membertype
A> NoteProperty
A> -name "Name" $a
A> $objArray += $output
A> }
A> write-Host $a}
A> }
A>
A> return $objArray
A> }
A> return test
A>
A> break
A>
A> $objArray = test;
A>
A> foreach($arrItem in $objArray)
A> {
A> $arrItem.Name
A> }