|> Hi is it possible to add methods and properties at runtime,like in Python?
Yes, semantically pretty much the same way.
For instance see Re: change perl function in runtime
> and why would there be need to do that,why is that an advantage anyway?
Monkey patching is a way for module users to dynamically adjust foreign modules to their temporary needs w/o changing the installed and officially maintained code.
Ah roboticus did good in mentioning Autoloading. It's a technique for module authors (not module users) who want to decide to compile functions only on demand.
(For instance this can improve compile/load time. IIRC does (did?) CGI.pm something comparable.)
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