My point is that learning to use something by implementing it yourself only works in a limited amount of cases. Only if reimplementation takes about the same effort as learning it in another way, it's efficient enough to do. So, it works for simple, small things, like most of the CPAN modules. But it's rather inefficient for things like Tk, perl, relational databases, operating systems, driving a car, learning a language or operating a television. And sometimes, it's even impossible. Surgeons don't learn their trade by reinventing the human heart.

I'd say that when it's efficient to learn something by implementing it yourself is relatively rare.

Abigail


In reply to Re: Learning methods (valid use for reinventing the wheel?) by Abigail-II
in thread Learning methods (valid use for reinventing the wheel?) by Fengor

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