http://www.perlmonks.org?node_id=887194


in reply to Re^7: Extensibility of Tk::TableMatrix
in thread Extensibility of Tk::TableMatrix

insert at index 'end' a row into tablelist, values are "row $hh;" and "$hh bla bla" into each of 2 cells appropriately

Oh, ok. If it was done with a for loop and an array for each column, with $w_t->insert('end', ["$col_a[$i];", "$col_b[$i]"]);, then it would have been clear from the start.
Anyway, thanks for the help so far. I'll look into tablelist and Tcl/Tk when I'm a bit less busy in a few days' time and come back with questions if you don't mind. The author of tablelist appears to be a Hungarian like myself, so maybe I'll pester him if I can find contact info.