How to test if a field does not contain anything else than returns or tab?

Andre.Bisseret Andre.Bisseret at inria.fr
Wed Feb 4 08:41:35 CST 2009


Hello
Thanks to all who paid attention to my question
Quite a nice number  of ways (mainly variations around counting the  
number of words)

best regards from Grenoble
André

P.S. Once again I did not receive a couple of messages; those from  
Craig ; I saw they were sent thanks to the answers, and on the archives
One more mystery of e-mail ?


Le 3 févr. 09 à 17:09, Hugh Senior a écrit :

> This assumes what you need is whether text is in the field...
>
> function isEmpty pFld
>  return (num of words of fld pFld = 0)
> end isEmpty
>
> HTH
>
> /H
>
>
> Bonjour,
>
> I need to test if a given list field in a stack contains some values
> or if it is empty.
> Well, by "empty" I mean that the field contains not any word or
> number. But it happens that it may include carriage returns and/or  
> tabs.
> In such cases :
> field "thisField" is empty
> return false.
>
> If there were only carriage returns, I could test if each line of the
> field is empty;
> indeed :
> line x of fld "thisField" is empty
> returns true if the only character in the line is cr
> but returns false if there is at least one tab in the line.
>
> I just tried :
> if last char of fld "thisField" is empty  ;-))
>
> that seems working well ! but a bit strange and might be not  
> reliable ?
>
> Is there a better trick ?
>
> Thanks for any idea
>
> Best regards from Grenoble
> Andri
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