Zugg Software :: View topic - [2.16] %null() only works with strings now.

Posted: Thu Dec 13, 2007 4:58 am

Previously I used null to return 0 if an integer variable was 0. I recently have seen this only works on strings now. Was this just another example of loose Zmud parsing?

Posted: Thu Dec 13, 2007 5:25 am

Yes. A zero numeric value is not supposed to be a "null" value. %null should be used for empty strings, but mainly for testing to see if COM variables are assigned.

CMUD properly handles the true/false for variables now. So just testing the value directly can be used instead of %null. For example, if your numeric variable is called @myvar, just doing:

#IF (@myvar) {true} {false}

will work properly. And this works for all types of variables now, so %null should be rarely needed anymore.

Posted: Thu Dec 13, 2007 6:46 am

Thanks for the clarification and details. I remember using it in Zmud for just that purpose... sometime it was the only way to get variables evaluated correctly. You might want to add a note in the conversion notes about this. I tracked an error down in my code to this and I was sure I had found a bug, until I looked it up in the docs and saw that sure enough it was only for empty strings.