There is a third option, don't pass it any arguments 

use Tk;
$mw = tkinit;
for(1..4){
    $mw->Checkbutton(
        -text => qq/check it $_/,
        -command => \&f,
    ) ->pack;
}
MainLoop;
sub f {
    my $b = $Tk::event->W;
    warn join q/ /, $b->{Value}, $b->cget(q/-text/);
}
__END__
1 check it 3 at - line 14.
0 check it 3 at - line 14.
1 check it 3 at - line 14.
0 check it 3 at - line 14.
1 check it 3 at - line 14.
0 check it 3 at - line 14.
1 check it 3 at - line 14.
0 check it 3 at - line 14.

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In reply to Re^2: Checkbutton in a loop by Anonymous Monk
in thread Checkbutton in a loop by gocpon

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