From: "Bryan R Harris" <[EMAIL PROTECTED]>
> (This is still the beginner's list, right?)
>
> I'm surprised at how often the answer to a question is "You should be
> using a hash, not an array." So my question is, how many keys is too
> many? Is there a rule of thumb? (like "if you have over 500,000
> items, use a 2-d array instead of a hash")
It's not about the number of items.
If you need to index the items by something else than positive
integers ... you have to use a hash. If the keys are sparse (you need
to have element 1, 1457, 9784 and 46486, but not the others) you
should use a hash.
How to implement multidimensional arrays is another question.
It depends on the task. If the array is sparse, $hash{$x,$y} will
work better, if it's not, use either $array[$x][$y] or (if the rows
are of the same length that is known) $array[$x + $rowsize*$y].
Jenda
=========== [EMAIL PROTECTED] == http://Jenda.Krynicky.cz ==========
There is a reason for living. There must be. I've seen it somewhere.
It's just that in the mess on my table ... and in my brain
I can't find it.
--- me
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