execute

execute
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Name

execute — Convert a set expression to a set of objects

Synopsis

execute set expression

Description

Sometimes you will end up needing the result of a set expression multiple times. If executing the set expression is resource intensive, you might want to avoid evaluating it multiple times. This operator executes a set expression once, and stores the resulting set of objects; the resulting set expression returns this set of objects.

This operator will commonly be used in conjunction with the set command to save the result of a time-consuming query for use in later expressions.

Example

This set command will save in the name DBClasses all classes with DB in their names.

set DBClasses to ~ //DB[^.]*\z/ all classes

You can then reference the set in other expressions without traversing the whole list of classes:

DBClasses intersection recursive derived classes of class "Persistent"