This is a very simple issue as far as I understand. There are plenty of similar questions on here, but I haven't been able to find exactly what I need. What am I missing?
Expected output
1 2 3
Actual output (error)
cmdlet ForEach-Object at command pipeline position 1
Supply values for the following parameters:
Process[0]:
Code
function processItem {
param($item)
Process {
$item
}
}
$collection = @(1,2,3)
$collection | foreach-object | processItem
First, you don't have to use Foreach-Object here because the pipeline will directly unwrap $items and send one value at a time to your function processItem.
If a function returns more than one value, PowerShell wraps them in an array. However, if you pass the results to another function inside a pipeline, the pipeline automatically "unwraps" the array and processes one array element at a time.
The parameter $item in the function doesn't accept pipeline input in your code, you should use ValueFromPipeline like this:
function processItem {
param([parameter(ValueFromPipeline=$true)]$item)
Process {
$item
}
}
Use like this:
$items = @(1, 2, 3)
$items | processItem
