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That syntax just is not going to operate. It sets just @w or %w and clears the @x or %x. Plus the purpose failed to get passed into two independent arrays or hashes: it acquired one particular lengthy listing in @_, as constantly.
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Much like the flattened incoming parameter checklist, the return checklist can also be flattened on return. So all you've got managed to perform here is saved every little thing in @x and designed @y empty. See "Move by Reference" for alternatives.
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Keys is going to be stringified, and when there are duplicates then the later occasion usually takes priority over the sooner, just like regular hash design.
The scalar/record context for your subroutine and for the best-hand aspect of assignment is set as if the subroutine call is replaced by a scalar. One example is, take into consideration:
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The entirely competent name of the first subroutine magically seems in the worldwide $AUTOLOAD variable of the exact same package as being the AUTOLOAD regimen. The title is not passed as an ordinary argument for the reason that, er, properly, Because, That is why. (As an exception, a technique call to your nonexistent import or unimport technique is simply skipped instead. Also, In case the AUTOLOAD subroutine is surely an XSUB, there are actually other strategies to retrieve the subroutine title. See "Autoloading with XSUBs" in perlguts for details.)
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Unlike community variables in C or C++, Perl's lexical variables Will not always get recycled just because their scope has exited. If something more everlasting remains to be mindful of the lexical, it'll stick all around.
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Optional positional parameters should occur In the end mandatory positional parameters. (If there isn't any mandatory positional parameters then an optional positional parameters can be the very first thing from the signature.
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