First of all, thanks again. I really appreciate the help from all you guys. I also appreciate how much more there is to know about this wonderful language.

A few question re. BrowserUk's code:

1. When I run your code with passing -O=6, for example, it also prints the structure to the screen. This does not happen when omitting the -O=... . Why is that?

2. What is the meaning of pp here? I read in CPAN that it is used to create standalone executables, but I don't understand the connection (and moreover, why do we pass the structure to it...).

3. Can you explain the heart of the packing:

 printf O "%s", pack 'V/A*', pack 'V*', @{ $AoA[ $_ ] };;

we we print each array to the output file. what does the / between the V and A stand for? I can read it means for a count of the packed items, but where does it value come from? and why do we need the second pack?

And one last question for now - when the ds becomes too large to store it all in memory, is tying with MLDBM the preferred paradigm? What are the alternatives?

Thank you!

In reply to Re^4: Storing large data structures on disk by roibrodo
in thread Storing large data structures on disk by roibrodo

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