good chemistry is complicated,
and a little bit messy -LW
Deepcopy of complex structures.by BrowserUk (Pope)
|on Jan 21, 2003 at 00:36 UTC||Need Help??|
BrowserUk has asked for the
wisdom of the Perl Monks concerning the following question:
I'm writing a recursive routine that does destructive processing on a passed ref to an AoHoA... but as I return from each level of recursion, I need to 'undo' the changes made.
Basically, I need to provide a deepcopy of (or some subtree of) the structure as I recurse in so that I retain an unchanged copy as I come back up the tree.
I did a search on CPAN for DeepCopy and came up empty apart from Data:Dumper which of course does a somewhat different thing.
The best I've come up with is:
but I far from convinced that this hasn't been written before; or that this isn't full of wholes.
Note: I know it doesn't handle coderefs but that doesn't figure in this particular application.
Is there something better?
Examine what is said, not who speaks.
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