Functions/TestVariable.ps1
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function Test-Variable { <# .Synopsis Checks for existence of a variable .Description Checks for existence of a variable, which may be either a true powershell variable (e.g $Foo), or an environment variable (e.g $Env:Foo) #> [CmdletBinding()] param ( [Parameter(Position = 0, mandatory = $true)] [string] $variableName, [Parameter(Position = 1, mandatory = $false)] [ValidateSet('Env','PS')] [string] $variableType = 'PS' ) switch ($variableType) { 'PS' { Test-Path variable:$variableName } 'Env' { Test-Path env:$variableName } } } |