These are commonly one-half hour of lecture with no associated exercise.
puts and introspection and using
the Scriptics interactive debugger are discussed.
| puts | trace variable | info level | 
| catch | error | info complete | 
Describes what the Primetime package does, and compares the Tcl extension with the Primetime shell language.
| printvar | echo | get_attribute | 
| get_unix_variable | query_objects | list_attributes | 
| report_attribute | define_user_attribute | set_user_attribute | 
| remove_user_attribute | add_to_collection | remove_from_collection | 
| foreach_in_collection | collection commands | filter_collection |