G'day Tworec,

Welcome to the monastery.

Firstly, I see you've commented out "use strict;" - uncomment this and also add "use warnings;". Removing the output of warnings does not remove the problem they're telling you about!

You've commented out the declaration "my $element;". You assign nothing to $element. You then use $element as if it's a hashref - this is why you're getting the error message you report.

Your print_easy_tree() subroutine assigns its argument to $node; you then make no further reference to $node! Each instance of $element in this function should probably be $node.

I believe that should fix up your immediate problems. Here's some tips that you may find generally useful (i.e. not just for this code); the first two won't necessarily change how your code runs, but they should make it easier to read and understand:

• Avoid indirect object syntax when instantiating: use Class->new(args) instead of new Class(args)
• Avoid embedding complex dereferencing within interpolated strings, e.g. instead of print "<$element->{name}>";, use print '<', $element->{name}, '>';
• The print function does not output newlines: you'll usually want print $output_line, "\n";. Alternatively, use the say function.

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