Listing All Variables in All Scripts

Ever wanted an inventory of variable names used in all open scripts in the PowerShell ISE?

Here is some code that you can run to create such a list:

$psise.CurrentPowerShellTab.Files |
  ForEach-Object {
        $errors = $null
        [System.Management.Automation.PSParser]::Tokenize($_.Editor.Text, [ref]$errors) |
        Where-Object { $_.Type -eq 'Variable'} |
        Select-Object -Property Content |
        Add-Member -MemberType NoteProperty -Name Script -Value $_.DisplayName -PassThru 
    } |
    Sort-Object -Property Content, Script -Unique

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