Be very careful - you are wrong. Since he is calling the method using $self->, he implicitly passes $self as the first parameter. Therefor, his call to displaynames() will work as it is. Your update is the real reason, as merlyn++ pointed out.

Makeshifts last the longest.

In reply to Re^2: recursion by Aristotle
in thread Trouble traversing binary tree (was: recursion) by Basilides

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