Conditional Actions (if clauses)

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In rules and actions, Tinderbox accepts a conditional action syntax:

   if(query) { action-list }

   if (query) {action-list} else {action-list}



if (ChildCount>5) { Color=red;Width=3.5} else {Color=blue}

The original ^if syntax, may still be used in Actions and Rules if preferred.

Note the slight difference between the two forms. The ^if version evaluates a conditional test for a resolved value of true. The newer if version evaluates a query (i.e. as written in an agent) test also for a resolved value of true. While both ultimately test for a true result, the initial test may need to be written slightly differently for each version.

Note that in the new syntax the Attribute=Value assignation is made inside the {} brackets. Conversely, the older ^if syntax requires the a single left hand Attribute= with the alternate values embedded i the if statement at right side. Thus, new:


... versus old:


The new syntax makes testing for negatives much easier than using ^not, as an attribute name may simply be prefixed is an exclamation mark:



Both the above work but using a $ prefix for attribute names is perhaps better for long-term maintenance as the syntax is explicit.

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[Last updated: 1 Dec 2008]

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