Powershell Not Expanding Variable String inside Foreach-Object

Question 1

I’m trying to template some strings using Powershell string expansion. When I use a string literal it’s fine, but when I pass the string as a variable it doesn’t work. What do I need to do differently?

$list = Get-Process

# this works fine
$list | ForEach-Object {"$($_.ProcessName)"}

# this doesn't
$template = "$($_.ProcessName)"
$list | ForEach-Object {$template}

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$list = Get-Process

# this works fine

$list | ForEach-Object {"$($_.ProcessName)"}

# this doesn't

$template = "$($_.ProcessName)"

$list | ForEach-Object {$template}

Question 2

You cannot do this with just a normal string. However, you could put the string inside a scriptblock and then invoke it with the call operator &:

$template = {"$($_.ProcessName)"}
$list | ForEach-Object {&$template}

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$template = {"$($_.ProcessName)"}

$list | ForEach-Object {&$template}

Powershell Not Expanding Variable String inside Foreach-Object

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