Why can't you pass the coordinates to sub C?
And do you call sub B, or does sub C call sub B? I think I'm distilling the notion that you want C to call B, am I right? Let's roll with that.
Why would this not work for you?
sub subA {
# ...
# generate array;
# here be dragons, an' arrays an' pushes an' references
# an' lots of dereferencing happens here, me lad.
# ...
return \@array;
}
sub subB {
my $chart_widget = shift;
my $data_aref = shift;
$chart_widget->chart( $data_aref ) # or however Tk::Chart be used,
+ matey
}
sub subC {
my $chart_widget = shift;
my $data_aref = shift;
# ...
# I don't have a clue what be happenin' here, me hearty.
# ...
subB($chart_widget, $data_aref);
}
And from your main code:
my $chart = $mw->Chart( ... );
my $data_aref = subA;
subC($chart, $data_aref);
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