sum() operator
| A Tinderbox Reference File : Actions & Rules : Operators : Full Operator List : sum() operator |
sum() operator |
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The operator sum() adds lists. (See sum_if() for a related new operator)
sum(where,attribute)
visits each note described by where and adds the value of the designated attribute to the total.
where may be any of {child,descendent,sibling,ancestor,all}.
In addition, where may be argument that designates a particular (single) note other than this.
what can be any expression, but is typically an attribute.
For example,
sum(child,$WordCount)
constructs the current word count of the children of the note.
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