tbllookup
This maps a value through a table.
tbllookup ?-side side? table value
side
is user-defined and only
available if the table is defined as bi-directional.
The default sides are input and output.
If the value
is not found, then this command
returns nothing.
Example:
set groupname [tbllookup groups 26]
set docid [tbllookup -side output docs "Dr. Watson"]