Re: [HTCondor-users] Mixing up 'is' and 'isnt'?

[Carsten Aulbert <carsten.aulbert@xxxxxxxxxx>]

Hi Todd & tj,

On 15.02.21 17:47, Todd Tannenbaum wrote:
> Re the below, ClassAds expressions can evaluate to one of four values: 
> True, False, Error, or Undefined.ÂÂ Note that "Defined" is not one of 
> these four values. So instead of writing clauses like "... && TotalGpus 
> isnt defined", try "... && TotalGpus is Undefined" instead. Some people 
> find using the isUndefined() function more intuitive, for instance "... 
> && isUndefined(TotalGpus)".

that really cleared up the fog - but I cannot promise not to fall into 
the same trap a few years down the road again ;-).

Thanks!

Carsten

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