From: "Bryan R Harris" <[EMAIL PROTECTED]>
> So about how many keys do you have to have before you start
> questioning whether you should be using a hash? Is 15,000 keys too
> many?
>
> I've got lots of data files with 15000+ x,y,z values. The x,y values
> are the same, but the z's are different between the files. I want to
> output only data points where ALL the z's in all files for a given x,y
> are greater than 0. Should I load the x,y values as hash keys, and
> the max z values as the "value"? I'm a little vague on how to
> proceed...
Depends on the x and y. How big are the ranges? How many Xes and Ys
are going to be missing in the range?
But generaly speaking .. yes this looks like a good candidate for
hash.
Plus if you find out that the script eats too much memory you may add
use DB_File;
tie %the_hash, 'DB_File', some, params, I, do, not, remember;
and keep the hash on disk.
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
--
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
