Recursively delete folders where folder name contains a number - arrays

Question

Good afternoon all,
I am attempting to delete folders at a specific location containing a number in the name, which can be any number in the array.
$fso = New-Object -com "Scripting.FileSystemObject"
$Versionarray = (13..20)
$folder =
$fso.GetFolder("$env:USERPROFILE\appdata\local\Microsoft\OneDrive")
foreach ($subfolder in $folder.SubFolders)
{
If ($subfolder.Name -match "$Versionarray")
{
remove-item $subfolder.Path -Verbose
}
}
Please see an example of the following folders it will sift through below:
18.172.0826.0010
18.172.0826.0010_2
18.172.0826.0015
18.172.0920.0015
18.172.0920.0015_1
logs
settings
setup
If I change the "VersionArray"array to the variable "18" instead, it will start to remove the folders. It doesn't appear to be going through each number of the array. I need it to be an array to future-proof the script as the number represents a version of OneDrive.
Thank you for looking over this.

Answer 1

Going from your initial idea to have a list of items that must be contained in the subfolder name, we can do a pipeline like this:
$Versionarray = 13..20
Get-ChildItem "$env:LOCALAPPDATA\Microsoft\OneDrive" -Recurse | Where-Object {
$item = $_
$item -is [System.IO.DirectoryInfo] -and (
$Versionarray | Where-Object { $item.Name.Contains($_) }
)
} | Remove-Item -WhatIf
Notes:
Get-ChildItem returns all subfolders and files in a folder. Drop -Recurse if you don't need that.
Where-Object filters any list of objects according to a condition. Any result other than 0, $false, $null, or the empty string/empty list will be considered $true. It's not necessary to actually return $true, as long as anything is returned at all.
$_ is the "current item" in the pipeline
$foo -is [Fully.Qualified.ClassName] checks if an object is of a certain class. In this case, we only want to look at System.IO.DirectoryInfo objects and ignore all files.
$Versionarray | Where-Object { $item.Name.Contains($_) } filters the $Versionarray down to those elements that are contained in the folder name. You could use .StartsWith() or any other method of .NET strings in its place.
Any object that "survives" the Where-Object filter is passed to Remove-Item
-WhatIf performs a dry-run, drop it when you're sure the right thing will happen.