Is there a Powershell "string does not contain" cmdlet or syntax?

Question

In Powershell I'm reading in a text file. I'm then doing a Foreach-Object over the text file and am only interested in the lines that do NOT contain strings that are in $arrayOfStringsNotInterestedIn

Does anybody know the syntax for this?

   Get-Content $filename | Foreach-Object {$_}

Answer 1

You can probably use -notmatch or -notlike in conjunction with each of the strings in your array.

Answer 2

You can use the -nomatch operator to get the lines that don't have the characters you are interested in.

 Get-Content $FileName | foreach-object { 
 if ($_ -nomatch $arrayofStringsNotInterestedIn) { $) }

Answer 3

If $arrayofStringsNotInterestedIn is an [array] you should use -notcontains:

Get-Content $FileName | foreach-object { `
   if ($arrayofStringsNotInterestedIn -notcontains $_) { $) }

or better (IMO)

Get-Content $FileName | where { $arrayofStringsNotInterestedIn -notcontains $_}

Answer 4

To exclude the lines that contain any of the strings in $arrayOfStringsNotInterestedIn, you should use:

(Get-Content $FileName) -notmatch [String]::Join('|',$arrayofStringsNotInterestedIn)

The code proposed by Chris only works if $arrayofStringsNotInterestedIn contains the full lines you want to exclude.