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Checking undef

 

Checking undef
Sun751

22 Jun, 2009 - 11:46 PM
Post #1

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I have got the code where these two variable are defined at some point where as undef in other $WCkey, $SCkey so,

I tried to do following,
CODE

if ($WCkey eq undef && $SCkey eq undef)
{
         --- Do this
}

if ($WCkey ~~ undef && $SCkey ~~ undef)
{
         --- Do this
}


but both of these won't work, Any one have any suggestion????

Cheers

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dsherohman

RE: Checking Undef

23 Jun, 2009 - 04:43 AM
Post #2

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You generally want to use the "defined" operator rather than testing equality with undef:
CODE

if (!defined($WCkey) && !defined($SCkey))
{
         --- Do this
}

or
CODE

if (!(defined $WCkey || defined $SCkey))
{
         --- Do this
}

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