Joey K Tuttle wrote: > Likewise, I had access to call logs (these were fax and voice message > machines) for outgoing calls, and it was instructive to compare those > against phone carrier switch records. As for whole numbers, it is > true that all phone companies use ceiling to calculate call duration > (I suppose that was the rationale for using it on money amounts > too...) but our worst case carrier used 30 second intervals, most > used 6 second intervals, and AT&T measured call duration in seconds. > So, no matter the rate, there were decimal cents involved. > > On the other hand, all carriers represented time and cost as whole > numbers (in characters, of course...) > > I once gave a talk at a j conference about rummaging these call > records - they would make a great source of sample data for a class > on data mining. > > - joey > > > At 16:37 +0800 2009/03/17, bill lam wrote: > >> On Tue, 17 Mar 2009, Alex Rufon wrote: >> Unfortunately, this doesn't apply here in the Philippines since the >> rates are always declared as a whole number. A normal mobile phone >> iirc the accountant said she checked connection time on the phone >> bill with the log of office's telephone system, marked all >> discrepancies and fax the phone company to claim for refunds. >> -- regards >> > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > > Isn't this why IBM supported Binary Coded Decimal? Floating Point sux for > money. >
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