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•Type Safety, was Re: Re: Standardized Interface Design for Search tree

by merlyn (Sage)
on Jun 25, 2002 at 15:18 UTC ( #177105=note: print w/replies, xml ) Need Help??


in reply to Re: Standardized Interface Design for Search tree
in thread Standardized Interface Design for Search tree

I couldn't let this untruth stand unchallenged:
Perl is not C++. It isn't type-safe
While the first part is certainly true, the second part is absolutely not. Perl is compile-time type-safe in that a scalar cannot be accessed as a hash or array, nor can an array be accessed as a scalar or hash, etc etc. Perl is also run-time type-safe in that an object method cannot be called on an object that does not understand it without triggering an exception.

Just because Perl is "smalltalk-like" in its type safety doesn't mean you have to "dis" it if you've only seen Java and C++ type-safety.

And for the record, I prefer Perl's type safety to "always and only compile-time" type-safety in those other languages. For every hour you spend "working around" those, you could have been coding another useful hour instead.

Compile-time type safety is neither necessary nor sufficient.

-- Randal L. Schwartz, Perl hacker

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