in reply to
Copy of an anonymous hash?
Dear Anonymous,The topic of your problem is called deep copy and it's worth while searchingfor it ... and he has a column on it ...
There is shallow copy in one extreme and deep copy in the other an in the middle lots of intermediate solutions, which one is the good one depends on the particular data representation.
For instance, if you are cloning an object representing an XML node, you will like to deep-copy all its children but not the pointer to its parent.
Shallow copy is usually a good solution:
all you need is to do a shallow copy whenever you change a
The moon would crash into the Earth
The moon would breakup at the Roche limit
The wire would turn the Earth into a giant electromagnet
The Earth would turn into a giant yo-yo.
The moon would orbit every ~24 hours, significantly changing the lunar calendar
The centripetal force would rip out the Earth's core
All man-made satellites would be destroyed, causing great havoc
Moon landings would become significantly easier
The rope or wire would break, no matter how strong it was
The Vulcans would show up for First Contact causing yet another revision to the timeline
The Galactic Police would snip the rope and put the Earth on probation
Some idiot would get terrible, terrible, rope burn
We finally get those golf balls back
Results (693 votes),