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Re^3: ref == "REF"by Anonymous Monk |
on Oct 18, 2004 at 20:31 UTC ( [id://400311]=note: print w/replies, xml ) | Need Help?? |
Not true,
Since print $$reference (when ref $reference is SCALAR) will always output a value. When ref $reference is REF it will output SCALAR(0xXXXXXX). The particular code I had in mind is:
If you look at the output then $d will have the same value of $d What is different if there was no REF type, and you would need to have a reference (for whatever purpose) at the end of the while, then you will need to create a new reference which will not refer to the same scalar as $b:
$dd is ofcourse undefined, and $e refers to the scalar $d, not to $b. Which means you went one step to far in the iteration. I don't know wheter this is useful or useless since I haven't really needed it yet, but if I need it I sure will be happy to have it. Else that second loop would need some extra code...
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