Perl is dynamic enough to allow calling subs which are not pre declared. I.e. not known at the time of parsing the call.
Is "dynamic" here used as a notion of "smart enough to understand by itself where to go look for things before exploding at run-time"? Because even in Java and C, which aren't "dynamic" in the classic sense of languages in which you must (statically) declare each variable/object type at compile time, you can do the same thing, e.g.: in Java you can call a method declared at the bottom of the class.
There are difference in the way the compilation phase is carried out for these languages, but they generally tend to process the entire "compilation unit" when they are building the parse tree (or whatever they call it), so they can understand reference to functions wherever they are defined (C for example halts you at linking phase if it can't find the relative object). I think Perl does a similar thing when you call a sub() defined at the end of a module to avoid exploding during the compilation(somebody would say interpretation in strict terms) phase.
This is not the case for Python, which stops if the token(function name) is unknown(NameError) during parsing.
In reply to Re^2: New Discovery!!! (sub call without parentheses)
by markong
in thread New Discovery!!! (sub call without parentheses)
by harangzsolt33
| For: | Use: | ||
| & | & | ||
| < | < | ||
| > | > | ||
| [ | [ | ||
| ] | ] |