PowerShell Gotchas: Looping with $null

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For some obscene reason, PSHv1 will gladly iterate with a $null as an array element in Foreach.

@(

$null, 1, $null, 2) | Foreach { "'$_'"; }

''
'1'
''
'2'

So, in the name of defensive programming, I've taken to manually testing for this case:

@(

$null, 1, $null, 2) | Foreach { if ($_) { "'$_'"; } }

'1'
'2'