How to pass directories

PowerShell Help
1

What I want: I want to create new directories as per certain requirements (written in my script) and move all DFF files to the newly created folder. Here’s my script:

My code:

function GetDiscLocation($parentFolder, $discNumber) {
    $discLocation = $parentFolder
            
    if ($DiscNumber -gt 0) {
        $subDirectoryPath = $parentFolder + "/" + "Disc $discNumber"
        New-Item -ItemType Directory -Path $subDirectoryPath -Force
        $discLocation = $subDirectoryPath
    }

    return [string]$discLocation
}

And how I am using it:

#Create Directory to Move DFF Files
            $discLocation = GetDiscLocation $stereoParentFolder $discNumber
            
            Write-Output "Disc Location: $($discLocation)"
            
            if (Test-Path $discLocation) {
                "Successfully created: $($discLocation)"
            }
            
            #Move DFF to New Folder
            Get-ChildItem -Recurse *.dff | % { Move-Item $_.FullName $discLocation }

I get an error of trying to pass an array even though I have explictly set the return type to string:

PS C:\Users\Lance\Desktop\SACD\Done\Mozart - Violin Concertos, Julia Fischer> extractSACDs
Disc Location: C:\Users\Lance\Desktop\SACD\Done\Mozart - Violin Concertos, Julia Fischer [SACD - 2.0 - 24-88.1]\Disc 1 C:\Users\Lance\Desktop\SACD\Done\Mozart - Violin Concertos, Julia Fischer [SACD - 2.0 - 24-88.1]/Disc 1
Successfully created: C:\Users\Lance\Desktop\SACD\Done\Mozart - Violin Concertos, Julia Fischer [SACD - 2.0 - 24-88.1]\Disc 1 C:\Users\Lance\Desktop\SACD\Done\Mozart - Violin Concertos, Julia Fischer [SACD - 2.0 - 24-88.1]/Disc 1
Move-Item: C:\Users\Lance\Documents\PowerShell\SACD.ps1:67
Line |
  67 |  … -ChildItem -Recurse *.dff | % { Move-Item $_.FullName $discLocation }
     |                                                          ~~~~~~~~~~~~~
     | Cannot convert 'System.Object[]' to the type 'System.String' required by parameter 'Destination'. Specified
     | method is not supported.

What am I doing wrong? Also why is the newly located directory name the same folder twice instead of just once?
C:\Users\Lance\Desktop\SACD\Done\Mozart - Violin Concertos, Julia Fischer [SACD - 2.0 - 24-88.1]\Disc 1 C:\Users\Lance\Desktop\SACD\Done\Mozart - Violin Concertos, Julia Fischer [SACD - 2.0 - 24-88.1]/Disc 1

2

The only solution I found was assigning $discLocation zeroth index of the return value of $GetDiscLocation.

It’s still odd that the return value is an array.

3

Move-Item destination parameter only accepts a string, not an array. I suspect that your New-Item statement is creating an array of output since New-Item will return directory data. If you want to mute this behavior you can change the line to

New-Item -ItemType Directory -Path $subDirectoryPath -Force | Out-Null