PowerShell inline If (IIf)

Question

How do I create an a statement with an inline If (IIf, see also: Immediate if or ternary If) in PowerShell?

If you also think that this should be a native Po

Answer 1

Function Compare-InlineIf  
{  
[CmdletBinding()]  
    Param(  
        [Parameter(  
            position=0,  
            Mandatory=$false,  
            ValueFromPipeline=$false  
        )]  
        $Condition,  
        [Parameter(  
            position=1,  
            Mandatory=$false,  
            ValueFromPipeline=$false  
        )]  
        $IfTrue,  
        [Parameter(  
            position=2,  
            Mandatory=$false,  
            ValueFromPipeline=$false  
        )]  
        $IfFalse  
    )  
    Begin{  
        Function Usage  
        {  
            write-host @"  
Syntax  
    Compare-InlineIF [[-Condition] ] [[-IfTrue]  or ]  
 [[-IfFalse]  or ]  
Inputs  
    None  
    You cannot pipe objects to this cmdlet.  

Outputs  
    Depending on the evaluation of the condition statement, will be either the IfTrue or IfFalse suplied parameter values  
Examples  
   .Example 1: perform Compare-InlineIf :  
    PS C:\>Compare-InlineIf -Condition (6 -gt 5) -IfTrue "yes" -IfFalse "no"  

    yes

   .Example 2: perform IIF :  
    PS C:\>IIF (6 -gt 5) "yes" "no"  

    yes  

   .Example 3: perform IIF :  
    PS C:\>IIF `$object "`$true","`$false"  

    False  

   .Example 4: perform IIF :  
    `$object = Get-Item -ErrorAction SilentlyContinue "HKCU:\AppEvents\EventLabels\.Default\"  
    IIf `$object {`$_.GetValue("DispFilename")}  

    @mmres.dll,-5824  
"@  
        }  
    }  
    Process{  
        IF($IfTrue.count -eq 2 -and -not($IfFalse)){  
            $IfFalse = $IfTrue[1]  
            $IfTrue = $IfTrue[0]  
        }elseif($iftrue.count -ge 3 -and -not($IfFalse)){  
            Usage  
            break  
        }  
        If ($Condition -IsNot "Boolean")  
        {  
            $_ = $Condition  
        } else {}  
        If ($Condition)  
        {  
            If ($IfTrue -is "ScriptBlock")  
            {  
                &$IfTrue  
            }  
            Else  
            {  
                $IfTrue  
            }  
        }  
        Else  
        {  
            If ($IfFalse -is "ScriptBlock")  
            {  
                &$IfFalse  
            }  
            Else  
            {  
                $IfFalse  
            }  
        }  
    }  
    End{}  
}  
Set-Alias -Name IIF -Value Compare-InlineIf