I have a working script using CPAN, yet my manager said its way too easy and I should try achive the same thing by using only regex
That's plain stupid and a waste of time. If your manager regularly behaves like this, search for another job. It's just not worth wasting your time this way. Been there, done than.
Imagine a carpenter's manager telling him to put way all tools except for a rock with a sharp edge. Sure, you could build a house with that rock. But using modern tools is less risky and way faster.
Alexander
--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)
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