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Using [incr-Tcl] to hold a list of objects
[incr-Tcl] example from a Well House Consultants training course
More on [incr-Tcl] [link] Source code: itlist Module: T245
package require Itcl
namespace import itcl::* # In this example, we'll declare our class inline # (in real life, objects would be defined in separate files) class vehicle { # Attributes marked public so that we can configure and cget them public variable itsa public variable owner public variable seats constructor {what whose takes} { set itsa $what set owner $whose set seats $takes } method getpassengers {} { return [expr $seats - 1] } } # Load objects from data file set fh [open transport.txt r] set vc 0 while {[gets $fh line] >= 0} { incr vc set about [split $line ,] set what [lindex $about 0] set who [lindex $about 1] set place [lindex $about 2] # Create objects and keep a list of them lappend waytogo [vehicle v$vc $what $who $place] } # Step through and report on each object in the list foreach veh $waytogo { set propertyof [$veh cget -owner] set whatsit [$veh cget -itsa] set pcount [$veh getpassengers] puts "$whatsit property of $propertyof takes $pcount passengers and driver" } # Example line to change a setting ... # $veh configure -owner "The Butty Shop" Learn about this subject
This module and example are covered on the following public courses:
* Learning to program in Tcl * Tcl Programming * Tcl Programming Also available on on site courses for larger groups Books covering this topic
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