Help with shorthand if else expression

Setup, Configuration and Use Scripts & Rules
1

Hello all ,

I want to write this code in single line like so

val DateTime dateTimePlusWait01 = new DateTime(CoolingActionStart01.state.toString ?? now)

if CoolingActionStart01.state.toString is null or not defined, use now

2

It never is (unless you have no Item by that name). Items are not variables, and are always initialized. An Item may however have a state of NULL or UNDEF to indicate indeterminate.
That usually leads to expressions like
if (myItem.state == NULL || myItem.state == UNDEF) ...

Ternary expressions in DSL rules use keywords if-else, not ??

var xx = if (expression true) valueX else valueY

3 Likes
3

Thanks @rossko57