Shell – Powershell – Arrays all on one line

I figured out a way to do this so I'll post it in case it helps anyone else. Granted I did have to edit the original PS script but the changes made are negligible and they don't impact the primary processing of the script at all.

Contents of the test.ps1 script:

Param ([int]$Local)

function Test1 {Write-Host “This is test1”}
function Test2 {Write-Host “This is test2”}

If ($Local -eq 1) {Exit}

Test1
Test2

Contents of the testtest.ps1 script:

. ".\test.ps1" -Local 1
Test1

When I run test.ps1, I get:

This is test1
This is test2

But now (with the changes made), when I run testtest.ps1, I get:

This is test1

This way, the script has loaded the functions from test.ps1 into memory (so that they can be used) but it doesn't process any part of the remainder of the script (because we Exit). Now I can use the functions located in this script if I want without affecting the processing of the original source script.

Thanks to all for the feedback!!

I'm guessing the reason why Powershell prints this for your second example

[string]$A = $_
Write-Host $A

[string]$A = $_
Write-Host $A

is because Powershell takes the double brace {{}} as a string literal.

As for how to make this work, you should test the $Array before doing the for loop.

Here's what the code should look like :

$Array = @(“This”,”is”,”a”,”test”)
if($Array.Count -ge 1){
    foreach($A in $Array){
        Write-Host $A
    }
}

And as a one-liner(ish)

$Array = @(“This”,”is”,”a”,”test”) 
if($Array.Count -ge 1){ $Array| %{Write-Host $_}}