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Thanks wind, this really saved the day :) I must say i copypasted it shamelessy into my script, given the deadlines i had ...

Now that i look at it, i see a couple of great things :

- the structure of %devs and the way it's built from %comp

- the way you "each" through %dev : $keys is a hash ref, (with the adresses of a device as keys). I need to 'each' more, when i have refs as values !

So, now, the grep. It's over the keys of refcomp, so $_ is an adress. Hence, if $keys->{$_} is not defined, it means that this device we are eaching on is missing for that adress. keys %comp has all adresses but keys %$keys only has the adress of a specific device.

Honestly, i would never have found that myself, the way it works for any number of adresses by 'reversing' the hash and looking at it from the device ... it's brilliant :D
It's also a very consistent way of looking at this specific system conf giving me a complete 'for sure' list of errors. Thanks !!

In reply to Re^2: Looping through arrays : are they equal ? by ZlR
in thread Looping through arrays : are they equal ? by ZlR

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    [perldigious]: Quick question, is undef %hash a recommended/good way to delete an entire hash structure from memory? Or sould I be doing it some other way?
    [1nickt]: The best way is to scope it tightly so it just goes away when you are finished with it.
    [perldigious]: but... but... perldigious is the unvirtuous kind of lazy in this case. :-)
    [perldigious]: Just kidding. Thanks 1nickt, I'll go ahead and do it the right way. An extra set of brackets and a little extra indentation isn't too much to ask.
    [karlgoethebier]: perldigious: perhaps a block if you are paranoid ;-)
    [choroba]: but undef %hash and %hash = () both work, too, but the first one keeps the memory allocated, while the latter makes it available for other parts of the program.

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