kirkmunro / typepx Goto Github PK

if ($results.Count -eq 1) {
    ,$results
} else {
    $results
}

#### Repro

PS> function return0    { $o = new-object System.Collections.ArrayList; if($o.Count -eq 1) {return ,$o} else {return $o} }
PS> function return0alt { $o = new-object System.Collections.ArrayList; if($o.Count -le 1) {return ,$o} else {return $o} }
PS> function return1    { $o = new-object System.Collections.ArrayList; [Void]$o.Add('a'); if($o.Count -eq 1) {return ,$o} else {return $o} }
PS> function return2    { $o = new-object System.Collections.ArrayList; [Void]$o.Add('a'); [Void]$o.Add('b'); if($o.Count -eq 1) {return ,$o} else {return $o} }

#### Results

PS> $result = return0; $result.GetType(); $result.Count;
You cannot call a method on a null-valued expression.
At line:1 char:20
+ $result = return0; $result.GetType(); $result.Count;
+                    ~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull

0

PS> $result = return0alt; $result.GetType().ToString(); $result.Count;
System.Collections.ArrayList
0

PS> $result = return1; $result.GetType(); $result.Count;
System.Collections.ArrayList
1

PS> $result = return2; $result.GetType().ToString(); $result.Count;
System.Object[]
2