[kepler-users] nil vs. null

Hi Derik, No that doesn't solve my problem. But there must be something wrong upstream in my worklflow for the expression to think s never equals nil. If I make a really simple workflow (attached) I can get the expression to work correctly. However, the problem is still in the RecordAssembler.

[kepler-users] nil vs. null

Derik, attached is another really simple workflow that isolates the problem with the expression. As soon as I put the selector between the nil constant and the expression, the expression doesn't recognize nil as nil anymore. And it doesn't work with or without quotes around nil. any

[kepler-users] nil vs. null

Hi Corinna, By definition nil tokens are not equal to anything Try using s.isNil()?NULL:s http://ptolemy.eecs.berkeley.edu/ptolemyII/ptIIlatest/ptII/doc/expressionsa9.htm says --start-- 3.8 Nil Tokens Null or missing tokens are common in analytical systems like R and SAS where they are used to

[kepler-users] nil vs. null

thanks Christopher, that makes the expression work after the selector - and makes sense, of course. Corinna Christopher Brooks wrote: Hi Corinna, By definition nil tokens are not equal to anything Try using s.isNil()?NULL:s