how to compare two strings from different arrays, if one string contains another?

Question

I want to compare if one string (f.e. Edi) contains in another string (f.e. Edil). I wrote a script with out-string, because later I need to compare two obejcts (all users from AD with accounts from NTFSsecurity (permission for folders)).

$AlleBenutzer = ("Adam","Edi", "Georg","Kate")
$Benutzer = ("Adaml", "Edil", "Eval")
foreach ($u in $AlleBenutzer) {$L = $u | Out-String ; write-host $L}
foreach ($v in $Benutzer) {$M = $v | Out-String; write-host $M}

foreach ($user in $L) {if ($M -match $user ) {Write-Host $M}}

I become output from line 3 and 4, but no output from line 6. I don't see my mistake.

Mathias R. Jessen · Accepted Answer · 2019-11-07 13:45:14Z

1

You don't need Out-String here - your array values are already strings. You can run the list of substrings (user names) through a nested set of Where-Object pipelines to test them all:

$AlleBenutzer = ("Adam","Edi", "Georg","Kate")
$Benutzer = ("Adaml", "Edil", "Eval")

$AlleBenutzer |Where-Object {
  $user = $_
  # If any value in $Benutzer matches the user name, 
  # this expression will evaluate to _something_, 
  # iow. $true in the outer Where-Object 
  $Benutzer |Where-Object {$_ -like "*$user*"}
}

answered Nov 7, 2019 at 13:45

Mathias R. Jessen

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