Pass multiple array values as ArgumentList in ScriptBlock

PowerShell Help
1

I have pulled below example from Microsoft Help docs and experimenting a bit further. I’m able to understand the fact that to pass an array as single object to ScriptBlock param, use unary operator.

How about when I got multiple parameters with [String] or [array] in ScriptBlock ?

Eg:

$array = 'Hello','World'
icm -ScriptBlock {param([string[]]$p1) $p1 -join '**'} -Argumentlist (,$array)
Output:  Hello**World
$arr1 = 'Hello','World'
$arr2 = 'Welcome','PS'
icm -ScriptBlock {param([string[]]$p1,[string[]]$p2) $p1,$p2 -join '**'} -Argumentlist (,$arr1,$arr2)
Output: System.String[]**System.String[]

icm -ScriptBlock { param([string]$p1, [string]$p2) $p1,$p2 -join '**'} -ArgumentList $arr1, $arr2 
Output: Hello World**Welcome PS

3rd attempt, I have removed for string type hoping it would fail but it gave output. Not desired one though !

Expected Output: HelloWorldWelcome**PS

2 
PS C:\WINDOWS\system32> 

$arr1 = 'Hello','World'
$arr2 = 'Welcome','PS'

#An array is an object, using the comma is an array of objects or an array of arrays
$arr1,$arr2 -join '**'

#To join the arrays into a single array for join, use a plus + operator
$arr1 + $arr2 -join '**'

System.Object[]**System.Object[]
Hello**World**Welcome**PS
3

Can you show it using scriptblocks and args list - if possible please …

Main goal is to leverage -ScriptBlock and -ArgumentList parameters of cmdlets to pass multiple arrays as input. No specific to use join operator

4

Rob has already given you the answer and examples. Simply add the arrays together with + before using join.

$arr1 = 'Hello','World'
$arr2 = 'Welcome','PS'
icm -ScriptBlock { param([string[]]$p1, [string[]]$p2) $p1 + $p2 -join '**'} -ArgumentList $arr1, $arr2

Output

Hello**World**Welcome**PS
5

[quote quote=242942]Rob has already given you the answer and examples. Simply add the arrays together with + before using join.

$arr1 = ‘Hello’,‘World’ $arr2 = ‘Welcome’,‘PS’ icm -ScriptBlock { param([string]$p1, [string]$p2) $p1 + $p2 -join ‘**’} -ArgumentList $arr1, $arr2 Output

HelloWorldWelcome**PS [/quote]

My bad… Thanks for pointing that… Appreciate all :+1:

6

Actually, there’s no array problem with multiple arguments.

$a = 1,2,3; $b = 4,5,6
invoke-command localhost { param ($a,$b) $a;$b} -args $a,$b  # elevated prompt for localhost
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5
6
7

He’s trying to join them, and as arrays it was array1 join array2 where he really wanted each element of each array joined.

8

Oh, I see. This wouldn’t work even outside invoke-command:

$a = 1,2,3; $b = 4,5,6
$a,$b -join '**'

System.Object[]**System.Object[]