Evaluator Columns
When the column is displayed, the evaluation expression is invoked once per file or folder. In this evaluation context, the following variables are available:
Columns can control their sort order by returning a different value when they're being called to establish sort order. For example, your column might want to sort in proper date order (e.g. based on the modifieddate
column) but return a text string for display. The operation
value will be set to "sort"
when the evaluation is being used for sorting.
Columns can also choose their default groups if the Custom grouping option is turned on in the column definition. The operation
value will be set to "group"
and you should return the name of the group you want the item placed in.
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